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 0x6ad9dd923e66b4cf5df20112f4bbcc6db30c18e71884747464e33cf662f98798. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d55ac97f-6a95-4fda-b963-ae92396c29ea.json and https://artists.proofprofile.net/proofs/artist/d55ac97f-6a95-4fda-b963-ae92396c29ea.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 0x29e6c10220ad29662eee9cd06e74402aeaa89693a1270ccbc1bbf0f138d46ed4. 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/ES7141500721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c09aa15a523b6ecfc6228a9892e107c52097868014cc23bd0677ea9089b957. 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/ES7141500725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ca6b7d96f2f79524e0baa9f7f4fe541c6b029acc1ed7a5334771be25c199ae. 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/ES7141500727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea9a9faf4319cdff1c85aa185d5e7b54518dcc809e1675348181ff978a5aa14. 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/ES7141500728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22d74ca7ee7f93e13be926038c3c3ca085a4b978bdeb20a00fe27edb7d825e2. 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/ES7141500729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808034a529ac4614aafa9a75816bca864799961cc0d3db6ba3af8ffff1835694. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES7141500734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4607b85ca176c0c115530404da539505f187293c90e1e9aea702868b722c29d. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/ES7141500722.
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 0x50f9914f2b79c244d28d1ad88338a5657e4bdda1262f8b3846c275932588da9e. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ES7141500723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4262fd0ba95ee25e9ce1b90fffe54d9a6d032c8e17ccf932b82cf9c343770f71. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ES7141500724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc915d5684dc0eef9f2dc527b86fb7cd42a62bd20788faa552b73671dbfeebeaf. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/ES7141500726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248b930c6c85c21ed2f5cfdd96a28d9d4fcda54ab539c2035522bfa28e2c259f. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ES7141500730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386a52e2ffa06e8085ef92d5dfb82f545b99c31434d9ed0bf8b7858309f43d92. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ES7141500731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacdcff5cabfc7a52c29712c32c05d0ec5b1d47e7e049fa5c224645e654427638. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ES7141500732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b64d39b2977b5e03716585916b9c0a32f133941ef5db4a53a7d0a660778abfd. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ES7141500733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35d01d42118b193e39b092c2ca9999f1a912f043bf683f8ce4d4d85684a165e. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ES7141500735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f349cbd0750b9d9ec6678c63816111dfb348fb116d666d16d8fd50d7aa8eb9f. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/ES7141500736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62d219921de3db0631c61e73deef2f0bc1e4495bf761f08a16bcd07ae08f1e4. 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/GBPFW1100637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645c13ae9be2f09550014fa792c5803789eca61d52302d7c6dff974fdd4d0854. 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/GBPFW1100629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27078b72dcd6f693aa36d3446711e70d2621043c990a068974523809e6d48dd5. 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/GBPFW1100628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16df165fdbb23bf31737f9e513ba7ed18d385ce03119b03e7df0fceab96991f. 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/GBPFW1100630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a259c40a7da9511305e7edddc8e15dd5d43bcee3d5dbd1960dcbb53cf7acef1. 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/GBPFW1100638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bad4b0e3914fb8f7d89f6800a1004d6c6051e85fc72ca942fbe1b43b2b0d05a. 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/GBPFW1100633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25fbdee84693368b3b0212a29f40e3d3d1a676c4ed7cb4e193f1f322006c944e. 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/GBPFW1100645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3519821405a0b49288c1c44bab98b00572ebf7d443734c0245b60e7ad75d4246. 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/GBPFW1100636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d5a136d3080d982be068707fae4b55fbe9f362dc613550863c62bd17484d06. 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/GBPFW1100643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc384d8b3cd29e1006c0a9802b52a070ccb7d8a04cafbcfc32f367a38ab72a9. 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/GBPFW1100641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2288efb71d474b5ac403641c6711ab7e2ff37e2c25a3c4414d0e985016512593. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBPFW1100642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0f247bc83fd73d592efab02d3f3f7e734b8e2a618644b9cf62344ca0a57f81. 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/GBPFW1200303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216cd185390403f13be0899e0f05bf6ce507aa15aca3aabff4c29a06b8632166. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR50X2236602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf29226b2f04953a6eeaadeb487253437f7d698606102b7e963cdd5d8e1058b. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/GBPFW1100640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f7a37793786c563e4ecacb83a964b17aaab9be2071db7e37916af3061747f8. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/FR50X2236601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed05d668f3c4947eb35b26d29fac0af78dc01767e13c736cada9ce3d17314cb8. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FR50X2236603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb9cd6932f412206fccb61bb85beafb1ea3ba3676a5b71bdddab031c5dc8a21. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/FR50X2236604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4f474c50d4043032810a932e068dcb76a59a17d5ee38baa6eb8e00d30ea794. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/FR50X2236605.