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 0x3eb1085ef151e2341d78cda9a7f8c563803eb9bda53540c0f2a6a95c48d09fce. 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/e945b765-cb9c-4ee2-ab7f-1e726ee15e6e.json and https://artists.proofprofile.net/proofs/artist/e945b765-cb9c-4ee2-ab7f-1e726ee15e6e.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 0x38ce028c7e7694fd56fe84f417cf4a0db360a51004d99448d423d33467838c30. 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/QZFYY1905740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a436e51d9943401298dfc59ddbb8802c7de46dfd8fb364d770f14d0302db0e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZFYY1905741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a8fb492a01ef2ceba022a9ed53960e2152e720c206b38d0797a1d49880d794. 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/QZFYY1905742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf251bbb7d1358230cfeb682b6913947337ed8b8d582e2ff24a79d828c1f825be. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZFYY1905743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67148eaefbb0475d3b61d8c87d9b81b59c00299960c57733989308743b4a36ed. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZFYY1905744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0580b5044fdcbdda86536aac296507595abd3ba5b0b1f3ff85181a147dd4e017. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QZFZ42008862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8f258b7b12c39186ecbf67f232da70c88e270f18c6e7df0a93ed8a824e98ac. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:27:42Z), 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/QZFZ42008863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba52181de1b6f499821d3cb91ac67ba64887ba9503f4422b4286136f0822f29. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZFZ42008864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831ef858f9c098257456b1d127bd39c15e8c54e453255cc6f2c0699a615a4b6e. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZFZ42008865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03740c9dcb7f81ddb818d960b8b1cee71db35347e29facf7b06a4b0bdd38a068. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZNWQ2035936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0438c083a913467abff6bf676a3ef863770431877dca68a862e98c60edc9d165. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZNWT2054965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84589a5f7623a994513b54232e6f95e1c671748580b4b6e92f045226dd8f02d1. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZMEN2515812.