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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 0x2bc7e27057293022338afe90cc17a31f3c6b3b68ca86f4676f30a7c58a28b7e2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2ca1e409-2ec6-4dc6-987f-5d670e0ab4d2.json and https://artists.proofprofile.net/proofs/artist/2ca1e409-2ec6-4dc6-987f-5d670e0ab4d2.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 0xfec236a418d3ec60771adecca773d90a68367b4c45d9aa1e66f8766ecb52164f. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/UST8K1784952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e04c3d5e7c2b3483d449e6c620da2b5f92b2c75fb90ed665dbe98af8b84d81. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZAPG1813793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b6a6f2c65ba24a47e6e5fc6f43e23f9fd1aac539d93cd343048e30e191ae71. 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/GBKQU1965232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8cdbf82f52b02d344dd81140e2a0450e443765ffde8faac8f4d20875b2cf320. 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/GBKQU1965233.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4502c697ef8ef65a8c24a8261bccabf4a5bbcbb5b80b7b849e9c279a954144ad. 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/GBKQU1965234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e292a75e74001c2c3c80ed985014ede3eec48be110c9804998a045598f198d. 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/GBKQU1965235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf470f2c43a14169470227502ceaf5279d7b2c992383fb7edb29960dadeed65e3. 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/GBKQU1965236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe670f95dea063e1e892c0c45b791ad4f422f4dab01b2d34f3b44dc5a90b292a3. 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/GBKQU1965237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf6ee6baeb133543fd6207e13000972385b366d853cee32b12298ec59de5fcd. 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/GBKQU1965238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65f697427abe972003304528e706f14328a661d6a9728efcd5aac625e2d6973. 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/GBKQU1965239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6abe2990ca62bf5bd5083f730c3354a745bf90b6aa9ed199f3dd2ef0202120b. 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/QZFYY2089189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0728efa260ae8a1cb56f3871c70679b2da852ffacb5ab88fcdb3caadb209d09. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/NL1LE2000810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc2bcc563fb0d7857efd694ce466ffe7cee1e2afd0676cd2940ced7eb24047e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/NL1LE2000934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd40ca1ce9474e5ac562d255a10c9b6252a6fab922c9121be05b6d004327ba0c. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:00:21Z), 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/NL1LE2102322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1256fbbef4621b825df3e59ae8329f17178dac9879b33c8e3f413823660cab0. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NL1LE2102323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1932af343b6d1f903e2fd51e2b29f046f7b840e53e1f1d2286a29edadbc1687e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NL1LE2102324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b858fa0788902fdf75371b2421f503aa7c2f43f1132079da053d93f9474824. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/NL1LE2102325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb9bd2f2653ccc832b2055f6699c11aef92821aa6c7d8d70d173c8bad95fbbe. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NL1LE2102328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8913c99e717ab29e48d83e03a3d69b0fc96b16609226c3fa0214f0c4688b8e8a. 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/NL1LE2102379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ecdaf28112af42acbf1181407d0f8003305400c9dc3ed00c1fe80584fbeeb0. 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/NL1LE2202668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c97015740645fbb3c91caa718dcccdc0fca51c84391cc23d60cfeba09ab060. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/NL1LE2202830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db76a6a635f22100ed8a627778d223c915f8603a554f794b311638a2b7bfd07. 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/NL1LE2303414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ecdaf28112af42acbf1181407d0f8003305400c9dc3ed00c1fe80584fbeeb0. 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/NL1LE2202668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc2bcc563fb0d7857efd694ce466ffe7cee1e2afd0676cd2940ced7eb24047e. 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/NL1LE2000934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e04c3d5e7c2b3483d449e6c620da2b5f92b2c75fb90ed665dbe98af8b84d81. 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/QZAPG1813793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564fc4409f112aa18f667322061b0737ca4fcd02c98d2be6f98e4a991050f453. 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/GBLV62025240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63100b775ac04d7f19fca24c86a0a3b38ef1c31c0b13aef4417890e3be590d5c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NL1LE1900353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a137b08c8d51f5fe2eab2c606cd18fc8bc2c7d3e6b9d81c5038292473c51678. 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/GBKQU1886836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357625d1095bdda264d3eb17977ef8104f8cc883cd9a0f93de57595afb6de0e4. 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/NL1LE2101995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8913c99e717ab29e48d83e03a3d69b0fc96b16609226c3fa0214f0c4688b8e8a. 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/NL1LE2102379.