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 0xe9d4b4ccc87b9c2e45171282abf7674eea3ca4e3c3a617528af4451970f8d095. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2b66f274-2e10-4722-9a8a-c05bf906fbdc.json and https://artists.proofprofile.net/proofs/artist/2b66f274-2e10-4722-9a8a-c05bf906fbdc.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 0x465cf39b62a3ed991f3ad64e08cb5c2e20d0664932d5eee4c16d73a01c329e71. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BCHFD2300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2461a72c2956aa02c002d00787fa30f2a0fa9c969fe7cc9e5a39da0b05bd4d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCHFD2300048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455e1a7f8a67429530fd2ee4052933e7a45b90d00fb9e872f162de945e6be103. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BCHFD2400273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e54322188b8eaefcb37e2bbd605be7e62a4b4265586c702185fbc9ed9ac4b2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCHFD2400279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a47541496f515b6046199914260def568497666ad821c085ef693e0fd1c384. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZPEW2555186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2680787f9593a41563e7986dacf7a1debf84ef66ddec1c1d8ea307b5d7d98c8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BCHFD2400271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1214d1c41e343e4ff3e73fc1217799b188dad0943db9130b0516e09d692029. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZPEW2553193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1180604668efea1f7ac8309173370e79d9d603ff8e740718a7351dba9f08f504. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZPEW2553192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7b5a4ea67fc0eaee4b5c1a0092dc5851f74183192bddabf42747096eb3617d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCHFD2400256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595744103b5d1ab7bb5abc67938da0523f48804ab87217f9567ab6b04c556e74. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCHFD2400244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbf6680dc24f835673a9a9da6b91838d387919d11e8c4b5a344f51a21adaace. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCHFD2400226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8445c22c5d1baa8dd23a1e0be1ef9173c558dfe687d0cb81b3efa42d6d0c0ef. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BCHFD2400227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd8206e6e2611e232638fc36a1a7c90589971cb453a5da4aa74b2fe744b08e4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCHFD2400221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c7b37ea5f60f4be6222cbcadd9593753e4a4f3365b5aa3d484c72d3a26b276. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BCHFD2400179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9800add3894efed7a7c4c7f1bf72c42230979cb40ec1c3971335c2f256ffb64e. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/BCHFD2400174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d71c017314962debed3a1bd1da7991efd5cba00a363ceca4919107c3408b40. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BCHFD2400132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7217a62c71a4333fde26e69683bc01287886c1283f5b1cf9ca6ad5a7dadf12ca. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BCHFD2400115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979be1b6ad5d0216bc728ac1f580bac7be20bd5c760869e1acb737e29da7956d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCHFD2400118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9843d1ebd597d5bc0fc157ffb08c13272bb916e2a623eca16804314d0e35b253. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA062489951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d0d3b754482420d5944e9c1fe22a73bb1e255ba504320729fce7a4bcf3d925. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BCHFD2400098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89345f6019958f5bac7c33bc32add671eb53ca8757466e2b9db6edf28662b8e9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BCHFD2400223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10800f1d84c83bc377a544391165b455d71feca32c6ea493838bf183bdb16479. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BCHFD2300152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9576ee7cdeea580e754961e9044f6a4e2957cd1d476ef619124236201de088. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BCHFD2300260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553d3c528c9d0661e5cd0b5d93ff471d1a0306d997fe7aab398ce58681a8a69f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SGW502372195.