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 0x9be3d10071c5a90cb2cad7f2533da7a1815a11aff05c7af4b0d357c3cfa2a53e. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/efd3a096-1a12-4ae4-a76d-8c2dafc50544.json and https://artists.proofprofile.net/proofs/artist/efd3a096-1a12-4ae4-a76d-8c2dafc50544.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 0xc2fe225f4f1a8f7777b385b5481bd4a38c098d316af77637cccc886e371c57b0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/AEA2W2323957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf750ef6283729b3d33056b618752c2ee8a0ce85dbe7cb6c8dbd29b227fd70c58. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T00:05:41Z), 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/AEA2W2361240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044f8566697fb41521ea06a61b8e9bfc7e09d929f85f77429c3db47c0e35f1da. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/AEA2M2303851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307eca150baa579ccf2e1ba41c13846b6a00214e850c87608c7419b9695dbe1c. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/AEA2M2314206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d62b6c8cd2a76ff7f28eb433e8bad2eaed35682c19fc056e8f01274ed837a7. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/AEA2M2341678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05555a0ef20a8fa9225a1a965cdfd61ba717ed3f4ef6bc478abf5dea1132dc2. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/AEA2L2357737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ea81b43191f7f321cd68e8adcddbd713f4edc6bedaab60c9e65a59f4e28ded. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/AEA2L2384173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4956bb1c2eae7a2e67bb883115e3d4274481d99781ddc79782b20fd8e475e006. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/AEA2L2389007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6dded8cdd5ab00044d48096ff6dfa04b605314d51ad46d28d0029ce57cb307. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AEA0Q2302319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62232d2312a39e2eaad3b1f2c3ee9e806b93cab1a2d06343cd5e8fc1fc60ef2d. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/AEA0Q2302321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee372d57789573c29289bd033375822bfecccd73e04ca1910e1a5275c2ef85a7. 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/AEA0Q2316726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4afe6ef3215c49c0e5307c46c69ad4350454a648b151caf1377c7b80ddafa00d. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/RUA1H2444662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f827e089d0fc08c162e8c5a9b28f56453afbc89782099b9b1421b967a9e0242. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/RUA1H2479621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b14a35c3721277f1a55bda81fb4af6aa6dacd8f9db874a893549bb8dbac631. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/AEA2M2419644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70e2dedfb46183534c1b9b259ce3d66aef23e5e161377a372658a68818323b0. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/AEA0Q2460716.