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 0x8d0fbde4c4fef1a80f989962532d9163b9398f404efc10e78b28aa8779108756. 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/b6586697-8303-4ebd-8958-41851ae3bb6d.json and https://artists.proofprofile.net/proofs/artist/b6586697-8303-4ebd-8958-41851ae3bb6d.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 0x3768dbf2eb441539fd259bac155febdf8bb4d0004004aff7f097e2a76f82cfa1. 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/GBLV62317729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3664521acef989fb0639c73240812939c6e3befb0ddb01d49a50deda19e52858. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/GBLV62317730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63342e3ab3358c8f3fb6f7fab3af9d31a2194312f4107fdf17385ffbfafaf941. 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/GBLV62317731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc646b469e5ad81923d4ff5a9d7a152f510bfc5038e0179be50fc11a5e09a2b44. 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/GBLV62317732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536d21535d04f05925e61eb6367279f21d4e9ec638d8055a57d916c734ddd165. 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/GBLV62317733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81512883b426918588d8bfe8c386d83dd8cc3642d4d9735ac9f600fe9699f8e. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/GBLV62317734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e4d292e3a30d0cffe876913749e51d74bab18e1971453adc14b16bf8be9216. 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/GBLV62317735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec1547d21522cb0869e61191b4e2decc0ea59822c222cc1d8847854052594dc. 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/GBLV62317736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7642cce14ab0efba093f8da1b8160fa81b224b317ec0b469f30a0a839feb95c. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/GBLV62317737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd2610ab4b0de5cf9e3860304c4c67cb596e5b12b041944adea2a417b83b825. 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/GBLV62317738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabebc1eeab542fec692343b513aa7d0804a4b5ba2c4627e4e35913e237be9230. 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/NLHR22500135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e96bf5b82a375af2142bbf29fac5f531841b5a3b652dc3727388f793de811e. 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/NLHR22500136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8660c8cdf861e6cdba6b236719e463b39f25406e66ae0b932179d2023ab5fc2. 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/NLHR22500137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e29ea0e12515fd9cc9862b23030a3b77e40f22d722d501032bc9cad79be826. 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/QZNWV2485317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f4ac68316a6f850e3ca68233639303e5e030a31e8ada893a4b5247688e3150. 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/QZNWV2485318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2c24fee5afebe09ac530beb3c0b919b1a68bb505cc6ba3ff9b724cbab07a3b. 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/NL7GD2400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59bcf30f976e9a0e5556e942c7040253910cd6570f61d31174fba13f653033b. 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/NL7GD2400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c492a80c85f9ab778faf2ee8059598da8dee4b44ff76cd442b404a421a2ad1. 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/ES94G2303907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd647460395a49da8aabc24ef70e89a681f946a247f78fbdb31beb0c935069eb7. 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/ES94G2303906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ca9272c87239b659da99c3b432edf23236eee34df01ca5f42dcc19b515df3c. 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/ES94G2303908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d248b0b0ace31601e3e4b4e84a42df81572af866cd24a542073e3833339112. 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/ES94G2303905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be704af73d6f4f8ea4931f316b13231f192776521ae2dedb073e8566b18f280. 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/GBKQU2365804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9935eae44636bac9ceee0cc8e27bae225faaf4b1e99c6eb5416fdef3bb8b2c45. 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/GBKQU2365805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ccb7a97ea8a43c5914c290418b8805a3ebe987193471192b1543d76e990fb19. 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/GBKQU2365806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a21b2643940ac9e6624dd70009e0951c076b51b13f4e300acc714ebc911b1e. 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/GBKQU2365807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a5934418ce845e8d252e6e5d32447cd88b021290cfb653a20aa85d9f797922. 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/GBKQU2324559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0d7052ceb0bbe5428e354d6cdb5e42780d6a25a133d3ca4013feb8c1fca859. 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/GBKQU2324560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5a148a8da668b51a5aa9dd9c71a4992eb16ae897735844ab3711682a973469. 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/GBKQU2324561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10a99a1a9e9b6a657c23e13a574745dbe3507bc149f0b5f3834c5ac12e185c5. 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/NL7GD2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea175daea6f6a9291460034d1dc9851e286a20a8118346910fe8df267235245c. 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/CA5KR2519343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e0c33594d5536f1884646d5ce1c1fdebcb00c506a627b64c7ecd131c937dd0. 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/CA5KR2519344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf6f535545571961f954683a35b19073ed0c7c50ae5cb96d659786b76b5de53. 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/CA5KR2519345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347f94f3d31ff96693ef0a468ab0044282f8f776d2e5e1374a019ba171ecc00c. 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/CA5KR2519346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a6cac582f8c419fd533685a389c024fabe493b314e487ac4d0bf66d6590e54. 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/CA5KR2519347.