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 0xf6be0313e1c51d20b1524aea52ef95dc65fec82e98dea2b3861d371ddd367c33. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cbbc3a7f-4550-4e21-8c3d-9cf623c7a27e.json and https://artists.proofprofile.net/proofs/artist/cbbc3a7f-4550-4e21-8c3d-9cf623c7a27e.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 0x1af0bb0c3eb3fcf1a53f34747ad03b979d1263ffdc40020a9d9c96891913f444. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/GX3Q92545691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1470d0b86c3de8fdb9a27cf7f62cd02edc2b907f82081ee1e68b20bd1054f877. 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/GX3Q92545693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8116de7a15aebe8a957554fcee7117b07893b0cc2ca37bbd4d08c43cb6acdedd. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/GX3Q92545694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96be9a509fd85f9a06e3779b20a463acac8b82dd7aa8f352d22778107a7c7e7b. 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/GX3Q92545696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a841611ba0fca92333100de3ed311a4b59f1b7b427cf7088772fff3acaf3d9. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/GX3Q92545697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c316197328eec983ec7273bb5d88ad0ebf94d19af6090cd56ae917c5d02443c. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GX3Q92545699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448041b2a87726eaaee8e6989e013555388c9ec3e90aacebcf3dcabe8fd631c8. 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/GX3Q92545700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc301d92b6482e80e4c6327396416ff0ea9082110c33c84a5611d3d40621e9ea7. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GX3Q92586445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f9f2aca6754dfdf5439f5a7163ea1bd9e6bbcf0ce4685721ca3a23da6fb5d4. 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/GX3Q92586447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249a188d6cfc819114603ef1e7ebd903994af75849ed890fcc4828cad7649878. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GX3Q92586448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2bac98446815ce63313d216f4cdfad8536ff9ffa4aa67be7f5d8abc9fbeb87. 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/GX3Q92586449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc6be3acc4e433d0757ad79619ae6e1e9a09fad0659dabf5bf655fc21749ee5. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/GX3Q92586452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad8193a3bcf13f2ef8565a97ed0274b44b6f359b7eb56462ce493ca91455487. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/GBLFP2504902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c09844810dfabde7c84876c0c1b280347b7a8c8e0709755f75b7da3ee8ace4a. 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/GBLFP2504903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa376e0f617427fb0629e33c2a215a0c156a6a8979d8506223411d10ccada25c6. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GBLFP2504904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c51cb963776250422261003cb36f2981b5c250bb83672d450c8a68204a66e3. 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/GBLFP2504905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f959eef84c68953898b7762dc2682e0d2beb149b11f50aec9482dd08fdc3531. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/GBLFP2504906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ebbd1e4e46c331cad60fb397804e1b86366f9f256e9a6d6b487f5f74bc2a698. 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/GBLFP2504907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f4458e0e5602232bf84ffd60c736fda0b226f800cf6a089c25a15991e30c7d. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/GBLFP2504908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58375c0d1bcb33dadad87b9d77cfd40e5ae7ca9a90de1275d7a6a883435ff368. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T15:41:47Z), 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/GBLFP2504909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26da6c4297d6b0b6c5ae7f59bc1a7db298570abc861393345a4b8d491e0e8654. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBLFP2504910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320127441bd0a8fd48db97c074b0f7d38621635e89106681c83ed6d44cff1b23. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/GBMA22526062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16a9fd6a0743a3578ad7ded87a8527e7131dd806604ebbe391990d376d022ff. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/GBMA22526063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb076244e2c553d3fe8d85f62544912201c8808f233cade3a46e4ae03b6b29c9b. 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/GBMA22526064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f808ec4ae4c128a5618d1231621bbbf2ed2b74b77533f0002907f74a198d12. 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/GBMA22526065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b683985e72ffafe1527e2a39cf54163ec4c94f20223effc27936184e883a98. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/GBMA22526066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2574d342554ed8585fc1180a1f830d80868f4b88c7562e578c7d80c0d1d090eb. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/GBMA22526067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c88e8119a09adf3c36b79c2d7d1a263bbe2a513815e7e0f726da512ce447810. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GBMA22526068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787df57957b9e15d0f3b4003d0fdd36d39c99d7c25de7e5964894f22335b77c6. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/GBMA22526069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20dd61777a6e3fc329a6564899a83d2f806a6b5cd08798bd7d42e6fbf5b4cb6a. 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/GBMA22526071.