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 0xe74a8f7157ba767689f6f296f32f5fba8f27a38346f680877bdc58b1342ca184. 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/95500a9e-3fea-4814-b3bf-48b6f51255b7.json and https://artists.proofprofile.net/proofs/artist/95500a9e-3fea-4814-b3bf-48b6f51255b7.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 0x614f801bdb8f8c297bc321d2abb224049ba93b1b887c203bb81db54d7b6d29af. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QM42K2079893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59022fa100251cef71d2f5267c3cb5564e4c96e92440ccb589977103839e0337. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QM42K2014744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a28efc043b15ff5896767bc6f5a0e7a290de63704b59aaa50ce5fd719e09e3. 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/QM42K2094823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ade9328646a5746511e6457e504f46f85650331b626d264f20aba7acbfc1f38. 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/QZKDK2124059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3689e2aefeab4341b0a77e9a5097d499cc703ab3eb9169155aa2ef7d2287286b. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZKDK2136501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb98a8c249db785d2f4c8556dc8638adc7fcff7cabc93d6dcd40ea30c990c035. 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/QZMHL2077318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943c5466b1d17215cf41d86d8b19a7401a229d0c21954ffa9bb87feccfca4dc3. 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/QZMHP2053917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb428f645139f484f43608abca3fc31185eebdabcf873dd1d19538e77524b8f4f. 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/QZHPJ2100259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44cd1d4c334ceaf79557cf5de38005ed000bdf5a548b8a19a0fbe73599535b5f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMDA72141928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b79569b044c2373917eae17e6df8ea460c8719a9dfd7a552e946915421f5fc. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZKDK2256115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9ddf3a9cbc17b8c086e14565dfb3871af622907e3f6998c88df541086061a9. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:36:26Z), 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/QM6N22256285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d391e68fd7c3156121732b911d3bdee7f041c858394a3c5533f0d6e2f96cc0a. 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/QM4TW2335344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ebfb63c4cf63cb049813254313f2d1d5a36e8aacfbdc1f0df4b842120c8fdab. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QM4TX2339717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21081300f0300824701ba931e224aae87ac9fae2d4f308b7dca9910f3c4a1c63. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:14:57Z), 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/QMDA62461157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16d2bc0647d54fa0914e01d1b3710ade5afb1436ad91d242f0daf228febefcf. 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/QM6P42522643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dffac09e3fd0d4fc68c1cd68b198cabb3d7401028946b3d5a6d3182658781a1. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QMBZ92558985.