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 0x910d0510d74332e730152bf056c67b98e4e7f7cc111954ca229cdea4478ffa41. 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/b22f97b5-8a4e-4848-8b6f-e9423067490b.json and https://artists.proofprofile.net/proofs/artist/b22f97b5-8a4e-4848-8b6f-e9423067490b.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 0x017d68da68e4b68c8dd9f364e12c799721ff3fa49b2ef791ba037d632b0a292a. 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/QZHZ41925374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622a6f56b179dfd95f75ff5c0346b1edaebc3045f5cb4c6b0803b4fd08f07703. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/QZHZ41941434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe193a6a36640fb3ca3a3856b6c164940f15eb26ef690b7817f866cd3800ef44a. 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/QZHZ41941435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2aa2761c8846117da41f9e0ead2cae0418cb05d5420242f562b97b9efecb27. 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/QZHZ41941436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abb9ed401a9598de4dba68f66907d4c5fa9c1f19e05e6b8c8a3dd0373b84302. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZHZ41941437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1722411b091230ecdf2aaa4d10992e01da7c0ad00c961ad1e34542e7ac5af2f6. 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/QZHZ41941438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdbb62d5a630f42196b7bbb4b88bffa554621f137ee6d9a6943217478a8d998a. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZHZ41941439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764ddcb9b5cb9fbf7d2c00b8dd35de0c30255f27ce819141b3d4853f73e08636. 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/QZHZ41941440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a247c84eefdb13a48a691573c19509b6b293416634c3514dfdcd02f004c44be. 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/QZHZ41941441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da776d741bcb977e14de0b709ca79dd1ff3413cb264a7f93366128976d287cb. 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/QZHZ41941442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf270b7cd433cdc4b3ea8a085f8651b6d1b4ebb1ada00e88b9f98829d345d7574. 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/QZHZ41941443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14fe294da5744f3e1c44cd8fdbbe98eeac0abfe1398039f3669f0bc93e86a66. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US7VG2037160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce7a55084bdd9ced9ea93e1fd8133f8e5606f246486d65e0fa19438b187c896. 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/US7VG2037161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05defd43feb0af4d28b380fcab610a091f84d23278e0fd34a600726b5d196a0e. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/US7VG2037163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec641bf42bf9907d26caa380b90d716c935ae7c9f7801114a2cee230656a00c. 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/US7VG2037165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa137e527ea7cf81b7e537f62d14c622b1996b83efc12814da0ff90123eee33b1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US7VG2037169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e779fbef435d93429db9a2e05d23363afc518693eae44e0d32aaa0781db1d1. 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/BRJPA2400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d25ba2dda7a4d13903d4c5f3dd00fbaa0b21df4d5c0a06a5fc3a7ee187c0e4. 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/BKRPE2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e223c040798b40d90d808bec70a5ca86413632de76c18c69b37d66f21051670. 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/BKRPE2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd860c9f54bcc6d52ebe52a3e7995bcd28d1649ce9c9e632bc062f9c4a5159c12. 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/QZNJV2325764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d15cc5da9d07906299b97299f3b8c7a9bb3b94620432811473a777058d979b. 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/QZ5AB2310525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1abf86e85d7e9af075d8299cd163c0cbd1bbebdf38a90ff4106df353a760843. 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/BKRPE2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea5ac2abeb9c9d012d629c806cd9d70a5aa54d144604efe2b34aa6361d58eb8. 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/QZHZ42201112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede8da8501347e9daf196d19cf9fb32c7cc3c3483ea10a8f00c9da511f2120a0. 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/QZNJY2159164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d1ccce1e20008af917926d0fc1a560b4c9d6457d966000f7abcb0d2b21f5fa. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZHZ42086958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859cd280e290087fe80abf6719a3640ff6ca94231f6ec43e108c6d71db868e4e. 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/QZHZ51922440.
Não Largo de Mão / Ginete de Fronteira / Vida Buenacha / Ritual Crioulo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc293f588af3c8735811a0e792638b8f968aee2d56997b34a7070c39e1db42907. 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/QZHZ41925300.