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 0x826d2cd5ed931daab47c59127e6684b02e3c3a1f8e943ffa0bc2a83e009a3ac7. 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/a03398fe-b7b3-4964-bdbe-4a1083b65b0b.json and https://artists.proofprofile.net/proofs/artist/a03398fe-b7b3-4964-bdbe-4a1083b65b0b.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 0x2fce3d87d1ae594de350b43d50816ac28df9956b2320e734bffeb32b224d79e3. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:44:36Z), 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/QZMHN2241935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0206fb088abeb876ae67fbe7616b54f141ac94a1b29b5e7e03d193b437ae723a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CH7812361570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc594ea40e62a9cbf6945c8bb2ecc2a312285ad01f9f58dbea9e1073858fda3a5. 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/QM4TW2421483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbdd3d53a7b11914647810a8392d81a89bfafaedc0ac8d602783ac1a22f6ea8c. 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/ROROT2400910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95c6b3e51633d003b7c628a15b338abdf9bc75b7aa927f314428c4e5263a72b. 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/GBLLT2504381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60c2ebfb1a328b4b51cc60cb7c3df67a94f724cb50c49f4edbee0897650c3b8. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTRX2542349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b6bf47dcd50303a31308abd5b3a342206458090e654fcb805f2684ad8f6570. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:59:09Z), 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/GBKQU2567697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99bea6c60e15e0275ba7a84dc0dfbdaac36452bf39819c63a2f92f6dbde20cd. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GBKQU2568588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567e4d60e508b64c78a212b3fdad04903e5bc1986942f3928f7e0c942a35a1dd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CH7812361192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413328301b21ec32c1519ac51c870e160707ef43067658cc2339e97e886309cd. 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/GBRKQ2499490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24a9e60878e243dcdff2d50c7c9dc89c1b5206a76acdfd66e768f4b374175b9. 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/QZS642213878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ccb69f4c9b3e9b8ae1e316f4a34f22ce193a38d256be25a7ea56af3e1cfb1c7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE6SA2484870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e042203da17f8a872724dc6d9848579d4deb04cdf5a73db361aa6d542c80d4b. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/PT1KG2101131.
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 0x6ab0313eae62ca011f60f839a20cb6d56c1779e1b7ce1d047492643aea15d275. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/NLD682203682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be93e7bc90aef0a12cd6176c71e373bc341193ed70be2cf055ddbd7c4961626. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZP7F2202387.