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 0xd00abcacf0b01f2d2a135a69fe8ce68a1dbdb2162144f28e144c011e67491ce6. 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/14acf577-c3c1-45e2-b858-176fa9ed3ca9.json and https://artists.proofprofile.net/proofs/artist/14acf577-c3c1-45e2-b858-176fa9ed3ca9.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 0xafb69790bbf64384ec5a5c1f27a198432c4c1461f958b9794dc0da492573815c. 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/BXV6U2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b371d498fda246df8b926049f5eef4bfec9d74285cd9c783d5c7488741b83cc. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/BXV6U2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd598d72d4c54ef05acd5d9a9f5c6252863ed0710c2b5064bc7254f6560de4fe2. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T14:42:13Z), 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/BXV6U2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84885d7755cb2b96e3e87e2415760b3487d552b1cbf436195764cbac92683ad. 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/BXV6U2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b371d498fda246df8b926049f5eef4bfec9d74285cd9c783d5c7488741b83cc. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/BXV6U2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb69790bbf64384ec5a5c1f27a198432c4c1461f958b9794dc0da492573815c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BXV6U2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673cc92f5dde4eb2b3874118bc343b5d5c6ec92bfd5bf061a966eba8c8cc0676. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXV6U2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47024874c2ea83af4ace1efcad1e7a1e864685147296a162f4371bdf7e3f6a82. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/BXV6U2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f83d2884b607f350a968f47581472672bb448d72ac9ea611d72f4189ffca783. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/BXV6U2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be1462cc72cbead9e8a1bb3184fe9f117b8b5b4e4ecd96b43a4880aef84b226. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BXV6U2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135164a2938e40e0cdea06b6f376d82ab800f146939cdc918c5a3bb5fefbb68d. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/BXV6U2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6133d580dbebe1d96b80fa629824b20ef8ba3e4a14a53d42b36f4ff525017b37. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BXV6U2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338ede02817fb11b71b26b5e22306d43d075c198c75ce8bc54e13e2dd870a921. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BXV6U2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc308ec4b447d8d546a7c007fcd4b8b336c3ec91dc86b44869432b9f1169ae1a1. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/BXV6U2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135164a2938e40e0cdea06b6f376d82ab800f146939cdc918c5a3bb5fefbb68d. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/BXV6U2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07e6b2a44221b084a0ed4a49c0dc3376fe91078a71b16686993fd41d255d2d5. 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/BXI3F2200007.