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 0x2861648c36e93ced740188442af147be00f00b8b41b7ea7735b8b6b7e0a27777. 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/6886a047-2c4c-4c1b-abb4-c42734f0e7ad.json and https://artists.proofprofile.net/proofs/artist/6886a047-2c4c-4c1b-abb4-c42734f0e7ad.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Relaxing Piano: Soothing Music for the Spa
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 0xb4c0c06cd873c3cb73ca45b1f07954a69784771db7613926032373c0a1e2d42f. 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/TCACR1656961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1de07011048038b50bf20ea845f4aa6ce98d89a2c3f784de4a7d9416b15aca9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCACR1656965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2c75a24729a4848191139bc014cd71b7fd581658b894e3b476c694f2cf51ac. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/TCACR1656968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e49d0abd740e130426a2ad29abca55ae857fe5baede564ab17c8787d5a51093. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/TCACR1656974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4196587f0e1881f51bae9b335eaf5a8189ffdcaf0a893e016ab185463e7635. 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/TCACR1656977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7278f254e4366db020a87b0ab58623c762ba840e8977262d0510915a020cb9e8. 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/TCACR1656979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf8cbb512ce49c44d2843e6c345dd6f8d01eb8a9076b32aad05111cdd70799b. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/TCACR1656981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb216fec7367365a71c66fc74fba5278e3117cb1f533a64076d183a89cb2e20. 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/TCACR1656984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a209f742b0ccde2028ea4504214e610509f8fbc43fffda4f42e2687837524bb. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/TCACR1656985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb75d6ff1bab2cba46a23f767f45a6e29608365b4583f7d6600dfaf58092c018. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCACR1656988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa102de6a6bc7d4d406b98d160426ee6fd9458af4f653b6a23a76bcda4e0c9c7. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/TCACR1656989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad382545463d8a5e0025d261ff047c0708c2d6da6cefb85b7b5d46c28abfc047. 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/TCACR1656990.
Joy to the World: Soothing Christmas Classics
Relaxing Chinese Classics: Celebrating Teresa Teng
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304ecbe7d535f127e4d6d791ecf2ddc6943db3e19c5c025e01e5a9fd24629614. 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/TCADU1880322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b325e73187a43e44140801a12246a529bfd35cce8771c42cabf4059b5cb8b27. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCADU1880326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f7f4971315fce48bbf53db97d73e838cf7ac28c610193224cc8badbe5b179c. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/TCADU1880327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289f9188457069281691ba84a11fff61da9ed6a2c4d419be11e7537dd1ac53db. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCADU1880328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7292e79ac1ece8d97d12867f421901a5456fdef66dfdb31dfcd2148693bcd3d7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCADU1880329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6cd2cb8bf784295020440293334a5fb113d60aaeb9d11f569c9b768f05d117. 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/TCADU1880342.
Sunset Sonata: Classical Piano Relaxation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15ba1eb23e49542a5ccdd7abdb07ce96ec9cc57145ad68fc366a601457d743c. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/DEAR42586359.