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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7b1ed5d9fe87365d340cf2fca623a7951dfbe56bb26db06ac39fbbaa9ab08f. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c803df16-a8c5-41fb-b1c7-0e4156c6cdfb.json and https://artists.proofprofile.net/proofs/artist/c803df16-a8c5-41fb-b1c7-0e4156c6cdfb.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66dc7eb881760a0f5010d5dd9377f50649d2a3ce0db687e59541f14a09049ea. 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/NL4CP2429066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a305c9679dd143fac1969c36a1e1e76609494963dae28212f70c2dbc2426f9c. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/USLZJ2592778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711a4d994b69a23260f04650a9ecdec6e6cdb3543bd5030840966b7440995e19. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/CAENV2502556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46a2dce7fab22e42a8f5ec125b03084b6e57b90f4b744af1ef4894fab1e1035. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/CAENV2504774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d08cad4f45c52fe13b3e49d28069335c2e37c370c9cd90a24039ad85643c71. 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/CAENV2510518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20b2def550fe66f33a5a9012a44e09d7dcea3cd40ccf929a491e4d548310412. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/CAENV2519699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d2d5e030bc9315d19daa038548d4ec75fdb3cbb3f89d1a30d734981b564761. 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/CAENV2519710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2768cdb3140cd3644f010cf29aef669ee3fd4f89177d354d5c67bf30d6cbd62d. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:42:42Z), 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/CAENV2519798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1d6f91c03fb5961207dae98f3591fcfe87043a55a3bcbf8926e1a077574ffc. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/CAENV2526558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ebbd6154c89c66d6a5630f50b96a9469ad9c6ab5bf877d62b10ebbecedcbb4a. 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/CAENV2527759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546dd9a8006dde49c10f55b24f1f31a09ab5180416257f24cba05132901268ce. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/CAENV2528628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda201d63945df66f762781dd4c83bbf4db3e25764b052d7b0b9396b82a9ae7c7. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:32:47Z), 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/CAENV2528558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa516eb5a2a44654ce7be6a756b31a0f7b267f9a6c41bd110cfe200b03844cab4. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/CAGOO2512231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5dd4cc4e7d14f68aa13ce517abd19b149faa2494ba398f451395863415eb5d. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/CAGOO2512233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112d9b61945923e855923c2176673a74d5731d31dedb4ce245b6831d7bcfa5a9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/CAGOO2512229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf1e497b497c28d4d27bc5ef93498a3837e6a4716de9cfd51f74b91722f0a4d. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/CAGOO2554624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a683ce2835630c6c31a53e449543a30e4714946daa4118acc196639e749048a. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/CAGOO2554626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0017c84ef22c35df767999f2f42dd336b67f51c55a65c4136536b45387d425ac. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T09:03:27Z), 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/CAGOO2554630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5888598104b55ebf5dbf00094fcb15e91b455513002ae55846b1422a700d6cd5. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/CAGOO2554632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e105f0de7d4f4472a0f2da0b5f70f920e8bb1e70fa2ab7bfc0a91d4346d50c. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/CAGOO2554638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903858326448c4d4c711c6253a9b0e03116f74e2e5b6f0643d7c7555022da6e6. 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/CAGOO2554642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cff0818003f04e7ee282b8928625c57469d914296b25650e69923143c1705b9. 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/EEHM52530424.