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 0x60c7aee09e488f7f72eacf60be31ebd60b2b8dc15988a82c2247031126ef7e4f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28f5405f-c647-41ca-9812-9b2f74dc164f.json and https://artists.proofprofile.net/proofs/artist/28f5405f-c647-41ca-9812-9b2f74dc164f.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 0x8a46d8857986c3dee49ca6e2c864e338967fb55ddc263094b99287ca07216976. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:01:05Z), 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/QZGWW1958979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7d6b87a3cb0dc345986b4bb9fdf2762cb5ad62687d06b566c73762bab8afa0. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZGWW2040109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48fab7bc372aa32014f815201c0f9976ca32d44ef2b37412fab4860b7c9a3de. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZGWW2021512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce101eaf8722030934163465d7466cb4ee318e4691c1491d618167295799bbf. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZGWW2079342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d05bbea0a82da19d691eab4d7eb453a88dd78a905d907c4848f1b2d7d3f1171. 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/QZGWX2026874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb97edda042ea6e9a41b1c77a7420c77850b8458f545e16313ebae847314bc48. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/QZPJ32168456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7550abc746dcbb61285c3236f3c89bc60a7348713ded3dbc88468ce7f6b4dc41. 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/QZPJ32183688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2fe0553d4cefc6a5bb8db83fddc33c1003c124575da1cb86f120a4808e359f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZPJ32183689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827a8a91f2ac35299115c39efbfbfc7b57b78f7dec121d6c3c196def4422ffdd. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZPJ32168468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33127a2194fcd4664c8470a4a9dd4c46c98270400f1b7dda5ee8ee1409abb6c3. 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/QZPJ32183690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289367cd774dd0a0b299ce8d31891e053830f726ec65ad661913f04cd6c7f41c. 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/QZPJ32118989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e77907122e90b4bda038ea27be7282381c34ed52fe8f65566aebc77d88f95b. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:00:01Z), 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/QZPJ32183692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995e82fdd25e98bbf5e6006c5d71ba7861a9f3a06d63bb8fb049f6dc784e237d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZPJ32214552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae5ee8b75be1f0ec2661cddec92509b798bb2863b8fa2f0698bac92e02e8bc2. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZAKB2470314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e101b6431b5631b3c98594a420a61494ac7ece8f79938232f99030ab94b48c. 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/QZH6S1900601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152a6f3dcd8b0d36ef3b335b673491b91072d65a65c957b498bcbea3291cb6de. 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/QZH6S1900606.