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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cf9b19754795df75350b1c1142281bea8978c8c6915c9bac53a2a734504807. 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/6f9a8a9a-f0a5-4f0a-9651-5cf862a16466.json and https://artists.proofprofile.net/proofs/artist/6f9a8a9a-f0a5-4f0a-9651-5cf862a16466.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a602c795fa4831236494c3876cbaa812f69100f21fb54ff6891416686f14ce. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:36:51Z), 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/DEY472474756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926e179daa70db15fdc76819283d8b8d5bc4a9ea5b32923750ee71f4a78fd74d. 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/DEY472474757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e320adefb152b7306e35537f7b666fcc51cdb03831682582f07d8dec16bfc8. 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/DEY472474759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c699783a3d47c85e9c463c74aaf5fea31f606de048da0170a68a85b256aaec. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/DEY472474758.
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 0x7efa3a37406af0cc7339db742258de6618d10c3729a67e18a9ad96fc0d8012a3. 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/USYBL2400463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c8213f0b8512cf17cf7d6bfeea9226e22707b4dda7eb4d4acd80ea44398c1e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USYBL2400464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8012c3d37b4867c4fb9e49e5bdea753222584a0119ebbadfea6335792aa733a3. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USYBL2400465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467424a8691cbdb96e32142991ab20a8dcfecb6db2d2782e13d7eba281da7176. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/USYBL2400466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2aae951395273ab8ed2dd3a59e8d633950c11f4df045c39c8977119f1c5332. 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/UKL4N1700217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2b7b51269370b5de6c1dc6984b351b363dd425912d859038e7bee15be6e10e. 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/UKL4N1700214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f2c9b3cfb6084f760e40dea98fb7f8ac207499e7e639b985058beeabf20f48. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/UKL4N1700215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0a154f917ad84bfcf612a695018a7cc6b4a5f0e394951531599ba29e6aef38. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEY472374229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5037764af98610ff0cd2155b22576336d901de08474b116a22684da9db6ac0a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEY472374230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801a81a440cce27a8b9485e3062dc2d8aefa235d5c9e87cee3f262a4ce5c194c. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/DEY472374232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03f854fddff6a189cfa067a13fe2a2f23d3ca8ad96848da024789d3ec8406ec. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/DEY472374231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aeb689c1251422057c19cb9f953d9afc219e6c95479d8074c5c02ee2a6b5edb. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/DECY52202120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc056d782ad290432a62f3ec63dc4f9ce676cedbd3e1f6a569ed8a39e60c4a3d2. 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/DECY52202121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8814afdcc2663ebef0cb659114c2129ca8cc04593f451c23f65c740ae6a41e. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/DECY52202122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26562ca11a5cdbaf5c7f6916b8f20c53430ed3ad0877349cd3218631ef7e8d43. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/DECY52202123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf73af9257bc4f5e6bbd8cd07b6a305d3a5852b7fe8879a2d33675668748b46b. 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/DEH742221917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dfa8ad5cbbbedebf9ed414361e29677ebdb53afc14c5f6be021a173b6613ff6. 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/DEH742221920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9331905f6b5c59b832e428ad56922758d6e7963cc81ba6c183d79340f82ab0. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/DEH742221918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8834bcce5395f425263452546a30e5e2d11ce5e9999e11ff69e3b840e3bc7d5c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEH742217747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab4ce2b359823b18b02b38f2e75da72b83e9d3cb0945b7f3a0f27584c966cbb. 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/DEH742217748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02fca8d2f0bbba1af37c8019db95cb02e8d3192134efa3b89aa0b426ad9283a2. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEH742217746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba49c07c29edfec5594d476441675558d7f81452d77cdd240e7e5e90346fe70f. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/DEH742217749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa223fde59add41817f362042a026ed18c62caec611baf1caee5899e38df6dc96. 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/DEH742217750.