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 0xeb8ccb4d865aa1dfdc857e312ce077883c5ef1b63fecdd221fbf0a46fbdc4646. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b4ca4b3e-b607-4fa0-91b8-4ca1e69b823c.json and https://artists.proofprofile.net/proofs/artist/b4ca4b3e-b607-4fa0-91b8-4ca1e69b823c.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 0x19ecaaaf5d3effc2809a5facc79f8a8a64b49110f99357aade9a055691d63f55. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZMZ92353420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53e03cc3556248c028813809c6f40d47923b493f588d0c25e60bbe8cf8c0807. 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/USLZJ2421782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511a5f1625e2b1db1a6589abf40b4ad67cc005a58e872f7c4200b21e2ba9923f. 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/QZTV32417741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2f275a60507ae5ded7b55f7e2740216bcd61c2290d8f41d93bbe7db4afa5dd. 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/USLZJ2417581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4145032ed55767822066b13e918a5e9ff3bc4d9ee30938c585bcc6046fead165. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZWDE2343755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80ff93273cd88e91db251831e66eb4aa37caeaa2bb38f98bfb394bcec067933. 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/QZGLM2372397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc217682edee5393e4b84c395aa21046ec2546d4cc4706e4893444ac498de67. 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/BRTRB2201339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ceb164425a523b2c8d619984d4c4c9a37a1e4132426c985500f392a688883e. 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/BRTRB2091502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b265faa867706b8749c41f4dae23fe579b87a20705c43d81c4b65cea32c74f. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/BRTRB2090588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ada5afa671730c7ad487c3580a2c52c90b61d8e71cbd73c27d6815700fec4f. 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/BRTRB2089809.
MTG - Late Coraçao / Late Que Eu to Passando
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dadc4186b3eed089d8cf3449281399b6b448cf7b081ef58993eb35768ededa9. 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/BRTRB2089437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140d84d4bf6ad7dfb5402954ca36c832fff1da3df9382e554aae904cc8b18a81. 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/BRTRB2086905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b39167ced43e12802ba2fe12a24aca6c1a3891e0ae28a26c7a9095ac99967f2. 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/USL4Q2161440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbbe9a30564852abb1e94ccd1eb5a81db18b687444cfb208b76f27517deff73. 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/USL4Q2105947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cba9b97bc95c6b4df53f961cc37957d1b9f332e0d4ec7bf7f161dce864cb962. 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/USHM92189769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78164cbff3afccd5231b6bfc055791be0f18bc3ed77960642fd881c7397ca98b. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USHM92150046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8763e49ede12a8610ec3bc32db4713b55aa0af02dd1099d80844a24bca2643. 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/USHM82178584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e0cdd14a111ea6d206ca69fb13b174d47a1299fac5127e6981af85f07ab98d. 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/USHM82172007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46fa7bdc7177305b466bd09865fcdc2a31025bb005dc79e1b9c322f280d80d9. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/USHM82101037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27dd548d2fccf4cfb7036fbdf22d002cfea7766658fa41725d89bab2cf53aa43. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/USDY42195574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b261ae113d030354233d97377d4640e522348bfd16e0a04226c50070725a80. 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/USCGJ2101936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636bbaabc5d3b9a269d4669fb506d8276fefa94ba48c0ee184c6be259911024e. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/USCGH2150205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e9ab975822661470871e22adbed5a0e4f6f001dc36f771e32c6717631d9c5f. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USX9P2006834.