1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e31d74dd6186ead17556e8d72c91131e3e336332752ba677c2f22d4f822bc7. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/92445db8-9920-4aa6-ad40-ab4b98f70d75.json and https://artists.proofprofile.net/proofs/artist/92445db8-9920-4aa6-ad40-ab4b98f70d75.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182ad6d42a9d82708d9b566ad48acee13d7c7173716b4d34f0fd6d7bbe7bb67f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732406743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6266e7ed094c8f89cd575793b6df1386cc40addcb945dd47a445bd5e0200c56. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732406710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb682add56e819663a89572e69dab84a69a056d57d53eca5f7ac32fcba2161b66. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG731679123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fedd9eee3bb9980794df84852865bce1383df44ea9fe67337342a6d9cdd7f4c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732457603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1bd0f6b8943ca91e46383507d699d6e6abb6496bcd96ac5eef318f891ef00ad. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKD012523409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ddf7c9995b8ee2c8664f934cd21c8f4f65d7754db6d1a7dcee6c0c1806f50b7. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732457581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9e0ed0756571fc1f0fc98284d48c851a5fb739abb1faa42ee62c53f8975afe. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732428425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8163682646fe66e4a004bcd92aa2652f6c3194dde119ea77ed6642c88ba1e85d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG731698057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b67c71b105d4ae99da5c10410e17fecf757293ec18f1561bb187ad9b3b7b6e4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG731682771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760743a79f03c40b20cb57bbcf60ccb833310acc9348ac1346d0677dc5533832. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ972340400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb80aa919b2bd552f1f2b3a356bc645dca290ef2e301d39ef0753796dea12859d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ972339396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c14b69d985d58c3a92954642bf58d3332792f088179a3bf0880553c57c3e3ec. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732271493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24b078dff1404eaa4b84dd6df8fb0514279d00691909fb440627e0dadef2b1f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732271495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1178444526070f7c6c28b3587fe222259a7d3612b4d0e5e6f126daad3a3c5d0. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732271497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dfa9d61c37b15f1d8cf9d594898dacad34ee308011c87abdda812c7f46c6bc7. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732271499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc48dc3914eb2147e273a60f07d1576751d8f2744a6e3b53f63819c732f6527de. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732469503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd626b54a5fa3ff30f86d442ccb743224356091aaf302b8bde5acd644d758e68c. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732469501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5ac70dcf424fbf4279a2738b8bec4396ffd4886b7e04eb65d9a37ef1e8ee3f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732469500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ddad59270c82d2f083503f7def2c56413f2668aef341351033592cfeba52ff. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732469496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec3dfb1cada0bd5248a2af968ad83d47c377d966bb31f2462a4c84913b6ee3a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732469508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd4f8e82c07cdb043ca201cd70badc281162f0b166b6f7be340b0f190598ffe. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732469506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ca25413de230742d23fed24ecda579783e83b5dc7ec4562a7c1534380c85f4. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732457594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf602623ed74ec860eca6b01683a9006d3b9e6b200c89041ca862fce1e2d95fd4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732457588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6024a328ab3776447ca7511bd42551bcbc3ae9d1afdc3aed3a0e207dc58ce52. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732428412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b86294bc2b1b146cf2c718fe3cc5ff02eb77fd6c12200bcc09f514fdc499d2c. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732406737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5407ad0d8fd9edaf913a261d1777977b33d45f1698a0880909e726092daedfa. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732406728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x151350c1e7ff755758775c9465662e434c0dc47c58dd96ba15aa860eed702431. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732402312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc14d385146e73e94914b31115fbaedfa5eb8237d67ee5edea37ccc19f40dd32. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732402301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c41b7b685541869b1d9fca7e5cdba7a43ae40ae950a0472720976233dd0ae29. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG731698058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0906a22c18147502591d601b5fadc2050f3388bdfea496df500fa94d25ba73ba. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG731698060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406b1e786dcb0a1242be6585d209603d9679383141419eea9a9613e00a24f26a. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG731698059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f55025a1a5eaf1604e354351deb6f492b3a47614efd57321fd346f1cd93ad17. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG731679124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3ddfbef6f3ac4eb99637b378e9cd90b7287637b08db67af2afb9fa337e0fc1. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG731670943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17105577f5518742d78b0046d80445317b40a06eeb994d884cc0fe7312ec36d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG731670942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761898019ce792c4fa05bdda382d6bd4081612ccd4159c078ab8d999e2223364. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ972339848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72eba3c9b05abb4dde5a3e4ce944c4f6a937c95ff16ccaf653c7e24971675226. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ972330572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fec939a044626286d1c828e173dd78fc07ef7d263894f0f0ae4cf07f0396b33. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732265411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b9da48a134d2a1921e4df3afddb415c7d37436f77809c458b24e4c77758b0e. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732265412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4baa2515932b66712389a42615593a34a7f99e6435c844da8e51e93ca80b6f4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732265413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05371bc8fc9271e2759a331128d292f221b4c24e5b2f7b4a8228cec50c9d77ef. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732265414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c2aabed41ae3f3ba2014324926ad85b055b3c1a7134281d20caa2fa2f430b3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG731603069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e2a4ce9e720e40d3ff964b0349898abd02f44b9c2a2ab6c2e2016970d7de0b. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732254805.