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 0x0cb4b663d4c654c994cff008705d86da1d82c70bdf4ca5be3c69da1e893dcb52. 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/79b45258-9b28-436e-b33c-9bbf435652cb.json and https://artists.proofprofile.net/proofs/artist/79b45258-9b28-436e-b33c-9bbf435652cb.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 0x94610f52156d318575bf54ce9d7bc1e72873c1dffeffc757cebdefdcaa0f8186. 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/TCAFT2150382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db304af02fa23052c2afe3d47f310b31f2625b2c19f0491c902fee0fb8ab2ad. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCAFX2104206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a148d06867e7f4ebc45e0637b9b800121dc77655e1d5a6b459f17ab176d35d1. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/FR9W12237987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe291c9d66faa9e86b3c383fcacefd79d66dc437bc9f1ec61b115003903ba326. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR9W12254613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b4cdad5258cd19cb901127ac9e218ea89a775c8166ce821480405587116aaf. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FR9W12305970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2627f62fcc6db7a694c658cecc3236a5d607503fd448b9bc31161700a125e9. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/FR9W12252363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55459eff14f4e5d38f08b76d6ea98838d083545df70f0c12de1f3dc056ec7622. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/FR9W12307243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da6f304a226b3892f0723529aadd84f48f1f85861c76d81be4424dc3213d1bc. 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/FR9W12307246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2de3a536bba205bb7ba43686e2daaff8dee84ca2f34b0996d262423554e71ef. 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/FR9W12307250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407d896a6d4b432b6becd9c10cddedb99d749f1b03874b6ec49343ca958d552b. 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/FR9W12403456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6909c7e266f29e7b2e76ebe8f18ca0feba295617ffe71b42b828fb9a47450d2. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/FR9W12419281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8546c6032dff2491c67fd8e83aec9705a87b5a12a7d37c0a1cc58d56aecb5895. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/FR9W12419282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e08159c75feb8a29a743c9a74ee5295112df44c967d330353a6a527fe01697a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FR9W12435766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaff25cc9d6e13520e3a688686cd2d4cc46c858c816e5d150ec0b0b116b57f92. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/FR9W12435768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6001b5dfc4a1e00731b3db09b06ad26bda35b34ede9ddfc9c5ec6402aaaa46c3. 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/FR9W12435769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b31fb4ce05a975aa30b7f2c6493ff9e61a85ebbdfdb19cdce1d76f4e5096ca. 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/FR9W12362220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc48376bca132a366bc8f10eae52b233a7affb36384b6760fbd833a0e6bfdc6e. 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/FR9W12234678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec7ba49289b6e4422d0c78655ca2bf11e456627dce85217ed3744dc089e686e. 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/FR9W12403454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc32d0a061fefd29ac953726802f603e86b6606a48ddaa75503c1c815766bde1. 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/FR9W12403455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407d896a6d4b432b6becd9c10cddedb99d749f1b03874b6ec49343ca958d552b. 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/FR9W12403456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953694ac3d6c8ec66c630bbe28f4a5660699f478423905ea06511a57d1f59ced. 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/FR9W12403457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d37892ddee514d41d889f09466c53089a70b445a040cab8559826575cfbc46. 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/FR9W12403458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af77b51d51dbfc3d720bc505c8257ac55f9467e401491eb93bbeca5fbc7ceaa. 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/FR9W12403459.