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 0xcb67e42575705f08ce7a7886dd0aa0edbd6d57b0db472d19728b13b0e8998281. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/468f52aa-db31-4d34-9446-e81845d0715d.json and https://artists.proofprofile.net/proofs/artist/468f52aa-db31-4d34-9446-e81845d0715d.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 0x4af826e1bba65724408b33840df1cacc2b515f1176e689eb6780a784b8e58b57. 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/TCAGH2262302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9946ac6f26593aec97d8f7cbad8061f6c74c87ed7e1d7683d557fe8b9d036e. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/TCAGK2213949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf382ff8c21070479492ca1ccf6e868f2106a1b796d287206e0bcd18da5bf268c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAGC2296515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532928e24b4647c3310c951c56ebb98801246d1cd9ec9b488f6c641615184d55. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/TCAGL2256990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301795d4c1f25868a085a67599442b8f6643499b34dc6289bf4eb3c5385d6f1b. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/TCAHD2358040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafab0fd85f7b8824734073b51d99f72fe14df5b1119fa652589abef9a724f027. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/TCAHD2365044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422ec2812bbd81bb63fddf578891bdb3cca4ba3d68ad931a283273f7e893497f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAHH2398025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3261b5378768b23e5aa7404b9d3032596e133e7686a0d152669fc026f146788b. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/TCAHH2397983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342ac812a86e421a625f88ef888c9742e01cdac912fa59e4fcd08115b75a8b78. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/TCAHP2354346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220ae02808cbcf5a46c7e60ee493b8bb6bab2e325843aebe64db3fc073f3eb66. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAHR2331245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30977cbd1d4d07db84c7cbf48cf4697f124291eb44bf39c73a40edc7ad3be05. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TCAHS2365068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb320b45a9639278e5b6d38a2d04d01799db5e8bb763c2b2824698442479c02f1. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAHS2365069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d268d63c7fe83814cedb93905f4126aaba9ba690d285307c91a87a4d880f854. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAHS2365073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1afddf78a97e2859558487e5ad517dd22909ddbb023c93e4271063eba4924e9f. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/TCAHS2316438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a111d450804d05fcd1abe4a4f7c1d1823324b5e340e37e751fe33c68be2813. 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/TCAHS2365082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177f05b3f304c166ca44e2fa03b01058acabcbbb6fd94c4b2212ccb54cd8706d. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TCAIE2410167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7ac58b8d3d749619f5d880d483147dd352e7ce299e3c403773df161c012dbc. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/TCAIH2427773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb626f60ec8e9b9033c0afea8e3d1a7f0224ba6ff77694a01b80dda341f74c687. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/TCAHM2387872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aac0059ec63e642eb157ecbb951069aede550505d232567dc7cced6e98895c2. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/TCAJX2503883.