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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 0x1d6af17ead5cfac8961eb3764837ea51584fa07affd11cc2f344b79f3b15a6d4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc465e78-e32e-46d5-b0e0-febf375a0165.json and https://artists.proofprofile.net/proofs/artist/dc465e78-e32e-46d5-b0e0-febf375a0165.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 0xe504f9f19694ca3a3bc17173eca1d9bfbb21f6765fc00606a8da6bde7b129572. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/SEVNI0201806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2737797c6155dace53c3a6e16989061dad7cc2f24c9b830301415c9265ef73. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SE2CA1100104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca09b12b45e27ac17f649aa778c493ae8dea4cae646308369e348351eb3cd1ae. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/SE2CA1100105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc116abd44e2a6631e3362a127244a1ef850d7cecc978fa61f4f3d358231815. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/SE2CA1100106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda14369e2c7facad231b6782e7c44ccbd3e9d8c41998fcbce88f96e8c603150. 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/SE2CA1100109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135b1c650bcaa25d4e6805bd0c97b715a840670907c5b0211457bee53518c54f. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/SE2CA1100111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd187638bcbd0f80621031524803e7a614d00cb12b92a06c3e621673a62b11471. 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/SE2CA1100112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230736dddb1bb2c9cc0b00ba47f7fd80a22f44d69079edab084c0a7e2353929a. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/SE2CA1700102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb85c6a9401e659afdfac014561837380a2aba5857f49486355fea648aefdc9. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:05:38Z), 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/SE2CA1700103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b746ca42d7fa14cb6d606550dd23964cd6e3951dea4ffcb6b611bf4bf7ae2c. 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/SE2CA1700104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6775307cfed9f07419c43e743bad4c597dfb2e34d2c63f0c6debbb5b3968add. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/SE2CA1700105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1868f50b05a28f85551db534d2226bf186f58655dc0943b26ed7e013495be43d. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:00:48Z), 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/SE2CA1700106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ef8ec2094915414679db16a4ace59f572668bee80ce920c9e548f8fdb6aab1. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/SE2CA1700108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0022e31e1838a91f4d2daa853a555454a0e7a08885c656cd8d2fb3456a4046. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T11:02:20Z), 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/SE2CA1700109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce3b07a645cd23f7374233e2c8253ee2c7443a9bcf5b0f0790b937b2d51dc53. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/SE2CA1700201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05eb465fba1cbdd04f56243d93a3f14fbb1b7705c4c8265aca71955e2839abfd. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:09:34Z), 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/SE2CA1700203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde983470cb2730d516a1f4ff68e6581798da48f12d2c0104021eee328bba2fd8. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/SE2CA1700204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed687ae34258f4f3d1017152c21c798b93a1b51c7ab70a18a0c8637696fa3782. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:02:27Z), 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/SE2CA1700205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813b022b2035b58cc285c3ab00c11096b4b9c05ee565e3b497cd754eff5dab4f. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/SE2CA1700208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86b52448a36ed53717e5b429ad58040cc1f9b0b3522870af9f10b7fe0dbb80d. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:34:03Z), 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/SE2CA1700211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999b1673d7d2be4f015cc2b14592b03d0ddf68ee34f55b263198da86babf1c1a. 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/SE6QE2402853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83fe08c085d32f97b2037d498ead204988fc67eaf8ddf17a24fc43a3544c1ab. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:01:04Z), 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/SE6QE2402854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3093fc81b3326eb8af8e886c39625c10480c838fbb0416982bbe497602e0bd. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/SE6QE2402856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde677f2a4c27e1a9ed800f16190a64509a3db962d4d11e311ea976fcf5f7724b. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/SE6QE2402857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961c66cbf09fccf2a63e3f07ad8398e2198484c288e7354e2c7a9f2a67c7f1e4. 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/SE6XY2501043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1decb9caa9d327968bd871eb983eeb83299a87a318ea32956cd8a591274efe62. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/SE6XY2501063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db8277653a612908965289c899982085120ae71898212da5447df80d3b412e1. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/SE3SA2301701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ac405df6b68aa10daf731c40765c0990ba5c342a05792097bc7bc9043553f8. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/SE3SA2301702.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch