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 0xa4b5bdeb26c44b9964ea0a0d7b728a90609a8a7730b529466212d3918e65a190. 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/7e158985-4849-4cd5-8023-c8ca123f16de.json and https://artists.proofprofile.net/proofs/artist/7e158985-4849-4cd5-8023-c8ca123f16de.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 0x1eb9310baf28d5274af22089510a2ba3c67c08cc23f6f9c454985b6e9501d6df. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T03:01:40Z), 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/QZFYX2198713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353d029a143a1a38defdb9060b7b55eccce9b50e71e15e7c0e18a0061dcd40cf. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZFYX2198716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0275659271b68b0582b2c25fee41a81639e178f0eb7a8e511f8e03293b2d3187. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZFYX2198720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf95bfdcdf27444671e8a5b5059731aa95bb61754c0d1e659098a75f67ede40b. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:14:55Z), 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/QZHN52023633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4a1e17f077864c63331f67686798ab16e4d237eb39a3e69286010638a1ff15. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZFYY2184113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440105e0ed9a5bf881cb7315f007f0278148fee1da53298be261cc8b3cd65fbc. 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/QZHN42078034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2020a0a9c7281176a9d9b0e1b1a516ad2a2802254047b0dbd66f7b1fdc26ef9b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZFYY2184116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49515cca686dd6246d4192466e7a2bab8b33472e73df376cb342c14b885ae078. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZFYY2184117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13eb2f95df94ae2138604eec05494663f9868dae1a97c3e90e86cc2977515a0b. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZFYY2184118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a50df376352d2b03f4e54f49734a77f7de4a7635202cff998e0bc9c301061e7. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZFYZ2194951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700e4954d44fe2f830dee0ddb5d823c83ba79483c4005955b7fc0ab3ad9dd925. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZFYW2126193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c87f7fb36577fbfddc5467a8f4537c5898b45a7b1ecdac55c69fc6e4227dac9. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZFYW2127337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37b72097349ecf42cc739da5afbadcbedd4152e8fd51fd50aa8cdc569c9a9fb. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:45:34Z), 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/QZFZ62351931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b313c36968e974fe89ab1a0b0cb00c8485a217e02cbb8732197e05b003bfcd. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZMEP2356019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa802c08f635257a5e50553d8994cb0b94b6097df5792fb597e8e84d04e6f1892. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTB22493067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa802c08f635257a5e50553d8994cb0b94b6097df5792fb597e8e84d04e6f1892. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTB22493067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd495e9edd676db17faf2ed0c38c49ef83f9ea319f44045801f3eff153ea9810c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:47:24Z), 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/QZTB72418637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa802c08f635257a5e50553d8994cb0b94b6097df5792fb597e8e84d04e6f1892. 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/QZTB22493067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0d17c9d99e1b74c473a56325524703bda098cb6f1df75674bc7527893e8501. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZDA82548436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa802c08f635257a5e50553d8994cb0b94b6097df5792fb597e8e84d04e6f1892. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTB22493067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd495e9edd676db17faf2ed0c38c49ef83f9ea319f44045801f3eff153ea9810c. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:19:02Z), 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/QZTB72418637.