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 0xdd7b8c09722ac6d3babe984ef7b3a2b83f59ad243355196501b7d5e12af4f37f. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d831bfbd-322e-446b-b4d8-181f8ebecec2.json and https://artists.proofprofile.net/proofs/artist/d831bfbd-322e-446b-b4d8-181f8ebecec2.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 0xb88adc3bb4d430c1a0ff9448a544d0ae55649fbb469d5ccb162323457b5daa48. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/DEZC62216748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa07476f16f91c15ec2c9aa669860339f2141d09120276de3b4edb7cfc0eb7e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DEZC62332675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3af875583a70ea15013241bc57b1502bfcdbeab15ffd06050ee59b33eddd084. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEZC62346518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b955416c02656c7ee36f61edaa059d86a1efd305a50fd61ec54560ecc14158e. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/DEZC62349588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ba25979d86dc60f1bdd37799b8850e801dda4390ec383b25b997fb7b7b2ffa. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:16:14Z), 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/QZWFQ2372013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27e9e6e175f3b0a252c77d3d82763644eb962353ecc5e3cac1b66911c406d9c. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZWFL2432598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ba25979d86dc60f1bdd37799b8850e801dda4390ec383b25b997fb7b7b2ffa. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZWFQ2372013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a702addae60e8366e4f7690a0d883ea58f3d91d5ccff137e9220ea10e33284. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZHN42459542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237685c19960df6d54fe6f4aae973d65ff8940b556e7600fc062b0b6ecb176af. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZWFL2432599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaaad7b4a2cee9835fe2ca98d9466f6dabe61448b3f71669e89a6da9297a2507. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFL2432600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd034c3b2b4cf2f35640ceba5f5ef75fe1789b0185d385db141e27c49805a843. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZWFL2432601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe781da0a6eaf3b4b37c13c9ec3fd07cb288185cc0c8f37e435200d8b40f2ca6a. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T22:56:16Z), 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/QZWFL2432602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5f95a793820aa8b6cab4106ec74eccfc181a798ea62587e7845f84b4357726. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:19:45Z), 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/QZWFL2432605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a3b292455806ea63ae1dbf6bee43ee3261c0d9f7ea0bdd1331d3527ed85b6c. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:41:15Z), 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/QZWFL2432608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8300011c6947b03bc90c9c65edcefc57f394c415ad3bab949bfabeed8ff49590. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZWFL2432610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516306c76433a080ad5e306be10a9eed76eccc2712649e6099f66ebff1382fb1. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FR59R2514356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695ce76366b876d71339376c58ca1981d4d83fbcc2130aadc3e1335f908612e7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZRP42511896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f3a0ffed24b5fd762a60423bbb5eddd537c1d1df12db81c37272bcb767f18be. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZZ7W2597071.