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 0x10884d67009263cbe2f92d7ccd759aa10364bb3b6b984305f40f431c4611422f. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cbb562b0-4534-47cb-832c-834cfa7794f5.json and https://artists.proofprofile.net/proofs/artist/cbb562b0-4534-47cb-832c-834cfa7794f5.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 0xc73f89769a37e14449580f531f2bb565dafd2dfe9ebc7a9654ab6ff738b13cc8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTB62261392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f8b998fe12318b9a508b2cdf1c986d637ae6591678ecee320c66f3ffce6de1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTB62261394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe790d70200a925bd3da4f5cd9bc27c40acfd710a1a9bec85150fdf78d891e6fd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTB62261395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e876bb567c97ebae4fb31fde2b3c4fb1a7ec95331353af51d98e10a22c12127. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTB62261396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06302163aa2d3f3d8ad45f38f1f6bdb35dfe5ca2f4f0ba5d877b12eb2551c4c0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTB62261397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701a24af2b4f3ea1823b24fb97c7f1d3c7c9640f5c32c07584a69055f07b8bb4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTB62261401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6dafd94532af286b6635b02621d0e11e776e827031099367aa4ce9feb4b9f19. 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/QZNWQ2279898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09465f619d8d7c10fdcadee65a7678d077a0e044835626ca52fdd97f90469114. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZNWQ2279900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf028a8e978d9aebc11ae578c73352cabc7273cf71395081bedfa84ddb26dbea8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWQ2279902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0186ed51919b30ad5971ec0cad7d1ddce8754563f399a5b47f68dbd7379984. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWQ2279903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda414d278e0dff6dad4a11e73cd3ba119711978e697810f85941febb3166469. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZNWQ2279915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e0134008a162a0f63597c1c921067c15ed561f0eadcb293eb55990fbbff398. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNWQ2279919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb378057d8bfd8c8cd02015e773f8e9707c7619f06f4b0390a3d249514bdb7117. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZWFR2329159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d50c90b67ae3f35228734498a0ca7f59ed44cb71ff227809d9b41e9e85a094b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZWFR2329160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0a851b258849d31aa340b7c1a8158d3e0d8c543b2e26ec301b3766d140a3a5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZWFR2329163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13de5c6f054aaaece5fef3b60cb72c1075b14b8b9bede22a1a2ea0956a73358. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZWFR2329165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71cebd8f77df60e2f51ccfa5e70c309ff3bac9e74765b1b5592512213ce2c803. 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/QZTB82282621.