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 0x9f498f6edb9f18b90d983b71232c79bb9ab7036485cb5b45547320da585b2653. 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/3ed018cf-9fb6-49c6-8912-ceb96c3acde5.json and https://artists.proofprofile.net/proofs/artist/3ed018cf-9fb6-49c6-8912-ceb96c3acde5.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 0xaab05ab1a41fe41c884e0a84d4b06e8979289b168c94230495f8d51ec1b9b5d4. Chain 2 (Bitcoin): anchored in block 958573 (2026-07-18T15:49:54Z), 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/FRX202266357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e14a8284aeeb0b95c30ecd0001a7e4d03142ee9514b49b8f26dbbbf5b5cd667. 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/FRX452331633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a6b8e7dc304d7e33cd48e9493c5c4eba41104f34c19bade1e5d18d86a6060d. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/DGA062368183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e037f94468493e55f5eb2f416ac99c0e85e1c053eaf8f00b12fbf976b1fd6d. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:36:15Z), 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/DGA0H2388701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290a336a5d42cbd049bf312d1ed3329ce4880ffff832037b89ad2335498b880d. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/DGA0L2397767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86467179b02a97dae7f4e179ec6a21abb64b0b5aee8462a3842079de0a29517. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:54:41Z), 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/FR10S2519102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62322eb4570d0328613a14d55ca855ada7fecdb515104ffe94a5f210e55b6d12. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T03:59:34Z), 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/FR2X42560454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86467179b02a97dae7f4e179ec6a21abb64b0b5aee8462a3842079de0a29517. 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/FR10S2519102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ccab1a44dcc01d25dc2ab91e98de4f4bb9aa6540ede623eba8b45e2f66559e. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/FR96X2508403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca4a875f5c7a1b29fef7fa5a67b928dae815d448128c4d724c76483a1f989c4. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:34:37Z), 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/FR96X2508404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13c7d4e8e8321b4dd5e9547d77847dfaa32f16976456a1ce9eb8114dfb033bc. 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/FR96X2508405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ca5aecd175768efd2e4a20bf5e8932f3ccd532a87ccd582af61bcb6e4180de. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/DGA072473005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0be2b8275218d9158dd934ded7f3329311a779b65471e0f5a139d82f4e856e6. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/FR96X2508408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97174456d7e1e235f4909a02aa4970421f13bdd39f55a85d99a432509e47ef4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEOV42300877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97174456d7e1e235f4909a02aa4970421f13bdd39f55a85d99a432509e47ef4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEOV42300877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe92785048a0638f8cd8153374bfa96f36dd045144afc6106f1c450b3594e4b4. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DGA052367102.
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