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 0xc829ff607a87955421014c1a8597fee2deaceb29d53edd312ccdb4c43f2b9c62. Chain 2 (Bitcoin): anchored in block 953780 (2026-06-15T12:02:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d45cd268-77d6-4c23-88e8-6da2fd7d4989.json and https://artists.proofprofile.net/proofs/artist/d45cd268-77d6-4c23-88e8-6da2fd7d4989.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 0x1048bb41b4279dd0d566294d72f9b1b9240e5c0887663990bc9f93980f047b02. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/QZPLR2200139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115abce91418b186615a01d1e980db3f22177dbe49c74b3129a771204ee45b20. 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/QZNWQ2287197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee7eeedbf994fd718bd5bdbbe7aa21e961679edfb513150e3da8f94f2c6b96f. Chain 2 (Bitcoin): anchored in block 957702 (2026-07-12T12:25:41Z), 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/QZK6M2266383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9e0776f62eaecf9759e292a67fb6e39342f2e120dbd5902b2df296ac51e191. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/QZES82298805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61550920d64dd59ca8d55dc6e7f9946ddc98a870bfeeb55b64871afef06c22d. 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/QZDA72326535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9018f1d2a9d9d8bae75294303bae9fe2814002d75dcfc279f57876b4ab57fd1. 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/QZDA72326536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa872d7d4ce88375344a9f5d744041f476ecfcf3a19ac5acf2eee7e481c397ae8. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZDA72326540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca45f19d300fa2deae02dce0d686c2e2cd794b0c32ff77ee5536a9ff75014848. 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/QZK6P2308582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851929ffe87c988900f5247579f79265217edb1f3e95e0a92846bc3aa8331ee5. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZK6G2315772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164043542d471a4cfcff655a9d6f199803dee395c99b5783534eb9b210d7443d. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZFZ32420972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2bcbb45993bede2d9e46283576d60b9e6ad1e2e9adf2894a38822877f3b2e42. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZNWT2530917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9325152ad7a6cc5b04d61401dc28a607f5eb3f702536b522026fad384743527a. 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/QZNWT2530918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5b7bd6fd25cdc218259115746ee7e4ebae5c95159c62ad49568db3dac26ea6. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZNWT2530919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f34b2ffe8c0d8c81fa8e3825b4d0f9f071764469457c7fc580a6da27f49c92f. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T04:08:24Z), 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/QZNWT2530920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df10b36a7fb2b9a8a6d5a56558784e10f5c40ea4119d229f42dbe0d2bfe762f. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QZNWT2530921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa68ae1f87919e19d89dd62ec2dc36766051b684a644848346ca4650efa6f18d. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZNWT2530922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc414eb78149495641f7ec3fff54ef3dffceb2effd4336ea90c9ea1b5b79ebf4. 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/QZNWT2530923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436a92f9321d3a66a4ed5d2d7da289a8f3ec031499df07ab9052c224b5a36d7a. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZNWT2530924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca45f19d300fa2deae02dce0d686c2e2cd794b0c32ff77ee5536a9ff75014848. 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/QZK6P2308582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa482f1563f207769cf281d3fef151d80027cca230be8a12810e6c0c24ee70b2. 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/QZNWT2530925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6c906183243ebb043ad59aefaf5e38ccee12c636ebfe233b31081e266c10e7. 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/QZNWT2530926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2772b6cbb6f70c0a4a0d7530c637040cfd013197e971b562a5395d2049b09a24. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZNWT2530927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe196e77572102a1f50ff8d6ca05713d01520d6a47ade91763e91075d171d0bd7. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/QZNWT2530928.