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 0xf5ed24904a4e5cad4bfbee03767c23b9f239d23aa56eace258e23852275eb4c0. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/12c9b62b-c531-442e-b6f5-aa428566f49d.json and https://artists.proofprofile.net/proofs/artist/12c9b62b-c531-442e-b6f5-aa428566f49d.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 0xf58fb827e89461205195df770bbb8743bffdb94f17641973d23615c9102ca49d. 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/ZZOPM2105829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09499bcd8a7750e50b40f96a1aebd9ee618f8f3e6300902dddc6a3072bac0339. 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/UKXN22049444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e257f02be51b8f433438ae346d357ee5d529569ae804cebeb9273ecb7e65a49. 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/ZZOPM2105830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb8231b19ff070828ee7e59c3935062c030c6dbea48e152901a32fb66a1f033. 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/GBMA22099161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1205735ef879f5c6dc9e94d865c04479f999d0766cba0d5d69d8e45634c20025. 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/ZZOPM2105831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4e694891e101c93536e35bdef1872a37d8665c1adebeff77a5d2546dc5ac95. 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/GBLFP2047997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5abb2035e69f72c9f9e7377e7ab4d045c7a199d02b3f1af51c8c7600903917. 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/UKXN22098952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2d084f1437355780f06a58d537f92bb6e94a919801d13272ff6fba30966e77. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/ZZOPM2105832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8630f271190bf777dffdbf8d4c5e69b44f739a5e9338ef9caf81671e9040a896. 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/GBLFP2046032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23102157d0ca30e917317a4966c9832dc35babe64477ccf37c3eb3850acc78b6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ZZOPM2105833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b407b0f9682bea453787e232a3c7ce5099858bc34659a1357aaa839373f7969. 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/ZZOPM2106212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a5cb712f2aaca1e43990993dfe927e37d6c5f9b0cdde93661ab11c9031fe28. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZW9M2266306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4dd30b8126d9857fcaa5bad92908d94ee009cf5d25efa57aa0f88f2fd30c203. 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/ES71G2057670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb8231b19ff070828ee7e59c3935062c030c6dbea48e152901a32fb66a1f033. 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/GBMA22099161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc3a7851486696ad32ed40d6fcba383cd8b56118b110ea53f7b4bf78ff07870. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZHN51998625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d0ae545521325378ad79050f4d19c62af65fabe62aee48e0bf05d3357aaf51. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZHN51998629.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca49f83d21320c3d35776965687a07e824e82ffc8cd776c2fd80a03e413dd4d. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/GX3Q92169491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34de09a9dd20bb822b53876d559698d88d83f75070fc16dcec41ef0f6a0b993. 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/QZHN71956796.