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 0x28e47d58746792f3a5a99a7d2cddeaf5cb547db3dbf82e69d025b91c4dd5aaab. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eec2363b-7ff1-44c1-9fe7-b22868277084.json and https://artists.proofprofile.net/proofs/artist/eec2363b-7ff1-44c1-9fe7-b22868277084.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 0x170ecf8b293cfa112a78262711315e73c9ef918d15f0daa9caa88c2a6df2ad47. 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/GX3Q92198479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8c5956702614260c042cec50095d5801b8d56a5d843a4f574db260a6aaaa88. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GX3Q92198483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28abbc14b111fc67a1e4b22578013f14f7f5c9d728ea3dbc460f85d39eb7e34c. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:14:45Z), 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/GX3Q92198484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11bd7bde0906735c2c2bf1907b58741d288bf1fb7af8fceec31157cc16c83926. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GX3Q92198488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d9d80d93a591e4a2b0bd1e6c6e938a7f843270fb23b5e6a09b4168f23eebea. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GX3Q92189886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a332b623d1a605326a4e7cb91fb56b35e8bc9a73b0fdb59b12eb17536c2cbe5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GX3Q92189887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4da93411b80eea44db78e806f4915d4b6d08cadd722e8b77aef126822907912. 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/GX3Q92189889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95177a6a07fd1ba96726f7082db5de003a083ce69a870d5b2648738490d59672. 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/GX3Q92189890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00511fc1542a31d3b7fd7118ead28aa47add313e16a33725746a23b28da82a9. 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/GX3Q92189891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249d6e7c3779b963180c97322922ea0086112915151e8e40c85fcd20fc135df2. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:18:46Z), 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/GX3Q92189893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ae62d7441a2bb86642fdb03128a52ed71454c396903c47172c6445ad18cd76. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:08:29Z), 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/GX3Q92189895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d811fc780871ca0cd09eeb90918b52e58010da0ef8c18cb36d3d6ac1d52b8ee. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:01:36Z), 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/GX3Q92189898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82c9a7be3185437656cadfc9c122e2256dd74cb9152bdd9c43ef8801147111f. 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/TCAJA2485893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84251027cfc26a29bdc0f9c036d4134098e0c45eb5b4e32aaae11c26d68acfc. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TCAJA2485024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c128153aa5a628c3bc021c3dbd5bb2bdcdac1ebe9f1a97bb6812b9ec301201. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/TCAJA2484568.