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 0x112323d7243452205259a039dc2e3516313575ce9b11f97da82a4b6884e56387. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3d47239c-2aa4-4d75-9c9f-633d65f2b1e8.json and https://artists.proofprofile.net/proofs/artist/3d47239c-2aa4-4d75-9c9f-633d65f2b1e8.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 0xeee6c2e8d6a23097c2711261170871770de1ae0445deca2dd7c9a0741dbbc3b9. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:07:35Z), 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/TCJPG1895582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657da06f40416afd42fa008bad9f5fd2951cd3a6097598636b3ec1a77ff5f3de. 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/TCJPG1895536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ef479813f8d0c6a8994aede775de31bd110916e3e75b64960d68806fd7e8b3. 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/TCJPG1895541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf128ee3b2ee280df3e7093ba4d8616530584975da5f72224a9045e7e803149c5. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCJPG1895572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35490657880142ad03a486cd3de5c4f091b61820ec7a72f408746d99bec209a6. 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/TCJPG1895577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f8c0888472790f3707f2254229dad205394de233851b90445bff30fc6bb5af. 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/TCJPG1895578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde04c59d9376734927651dad5865d166135e476e887327e99e864292a2b772c5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPG1895580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee6c2e8d6a23097c2711261170871770de1ae0445deca2dd7c9a0741dbbc3b9. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/TCJPG1895582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2f340de9c23cab4cc3bcb617828d994bcd333ee4c35e857ae207cf9de4749a. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/TCJPP2152922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80effe7e38cb27224e919bdf283b60b1c745e86f7a92f9e4c78b2af88db3a662. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:54:05Z), 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/TCJPP2152983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4727ee7fcbd123a2e90b9af85b4009f0011dfb414ca91f29d64109dcf51ba1. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/TCJPD2568187.
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