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 0xe7539a4b43e66889b20ad453053b1b66aa991c7b4a2b974290c7a6c777770766. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4bace10-db22-4eac-b5a7-62f83eee5163.json and https://artists.proofprofile.net/proofs/artist/d4bace10-db22-4eac-b5a7-62f83eee5163.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 0x4c26a959bbcc87c801fbdd204ad95e82b050747d7c62b208ec2a5cfd984f27b7. 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/DEG932102178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780195b1a5316acda52457e46f59060d0ed310668e19fb72a817f60502a306b9. 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/DEG932102176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c1b3aaa6e0807ecc0ae3c5ad4d36835b922b6b0d31d7f3192eeaf174fee341. 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/AULI02036910.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30cb088529c0878ced5260af18a06087c34cd9ac92bf533f2457956d4db6e152. 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/GBKQU2094751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16c77cdf22dd54a7d8ef7c01badafdb17862173786a7778889c4ed6fea9685b. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/GBKQU2075266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeebee1f7f66146fe0e9841c4691ac88333789971112de252b66da492c7564bd. 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/GBUD71500264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99803422ea3615bdddeee8699272f80b06e4e1a9f2e5f23a0dad50eb5cf1bb8f. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DEKB72050338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ddf504fd659ee09cc4cba6cb3ffb09acd9f4c54a8956cf22b1b429e72e61bc7. 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/UKA2G1703009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cff65dded0ba43b38b1aebe5c206ab774fb3fdc1177af45e5b34a07ef09af62. 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/UKA2G1703010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a627a94887f9be89f046f3b19d4b5708397c174aff558bb407a36d1f6417c9. 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/UKA2G1703011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ac4a0361f938cf3d6a1cbe0fea327ac4471adb897866a407209fbaf8e1882a. 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/UKA2G1708005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0712ef774a1d871be9928418debc972f8d64daf986ca55e69c987892a644fa. 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/UKA2G1708006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5180a44a0380a5810e717b3a8916ec7aa4db2e050ebf327c3f4efc5cfe534f2. 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/UKA2G1708007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6883d0abd67b30e1b426e67cffe62b6b5d57a5f2468e8ed02be05c2b2aba297. 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/UKB8U1600066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b432ac9fa7fb62088848db865113a1c958fbaa83fa356780aa961a18275bfc6. 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/UKB8U1600067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc54890a5d53c43adc903a38af42ebb6d675f5ae7ba86b54ae1b72c6f1005cfd. 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/UKB8U1600068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944548524d6e4d328f578f03c2e6b3d4010e7c328ed9083c2a71b704be7470c4. 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/UKB8U1600069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6791b872fdafdbfaa0b71bc2eac46531ee27efbd77ee149e1021f1d730a12005. 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/UKB8U1600070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf6b4d71f17c71041b1c5af33c663ac0dd28716e10971b9b084168c897c0c12. 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/UKA2G1508001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d63967ac0da6d8667516e7ad340f8eabc41e3c90af97f0ec1d0abe4db5175d9. 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/UKA2G1508002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965c2335873c9a4acbcf120df88a61ac6005170bfe8831e5ef53e52cc5181481. 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/UKA2G1508003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b26b98c33131e65666c7defbafe0820e5338aaa2b88fcff5d3e5a5b6895782. 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/UKA2G1508004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7506cbd2951595066bb2ad5d2990229bbb5ed4d8ea1752032b1201c5b7070c. 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/USM1G1500004.