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 0x817e37fbdee0d1f71cbabf6f5d49d2d13b60d807d90a224ff89956ea765e2705. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3e85cc61-2465-492d-8835-3c6d62b6434a.json and https://artists.proofprofile.net/proofs/artist/3e85cc61-2465-492d-8835-3c6d62b6434a.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 0x7efb5aa636dd1e8b7b24588e71e9fb9dbf30d6eaf5734d408108b9a9eb2bc1e8. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/US3DF2235594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5925eca565dafa2c8ec79f1e374d33219cea1ee6647d93308ce3888506beef. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:12:54Z), 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/US3DF2235602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2913540a349ba700847537bdb0b5b98d696bdb427d87f2e0092f25f85958aa. 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/US3DF2235609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d2d9a328edbd35f7daa03f0a3b765ed2a825b7a9fa4d5416455a1ee8fd301a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US3DF2235612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5689fb02e628029fbd9782da4c2f12ac2af4f6ef6c011f55465cac2b347b13d0. 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/USANG2419655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb0739fd3161e1423c548aa62f7ceb4c7bd5366c939d7be7ab222a3beeb2e18. 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/US3DF2455687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e9e5f7e2b020c2e14a28c1f0999d59c96e718121199a8cdfedf810904656d2. 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/QM3DF2499059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8cbd415ee2c42774882dde9ee412755f02982dc8bc29820b54a78ec4bc61ecd. 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/QM3DF2446273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d3c56ebd0fca76514108a96ace25dce403c5e1cef00f6356c4b7360be6eee2. 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/US3DF2444407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080b59c5175da05aa8d8c4db24050f2dbc92b1a85e0952fc710547a2d5a74cd3. 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/FR9Z62300877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357a4c38b2fea15fe6586e28cf8d9ef467eb5412d57880a5b58db23b3b8356d6. 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/QMANG2257005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa925218f14f989188d687e380891c6f805b5ff5fb9a5daa10455d57ef197ac12. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QMANG2220911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11491973a3067873098e6a32ff5954fa5ad7e9c3d4e69c96e65d60b50b7151d3. 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/QM3DF2293136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda450a434fe56f75e2a48f31c79c4fc80830d43eb95683a29925e29d6aee43cc. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USANG2293241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc159d644b09ce302c0fcd6834f7f39f7ef874f8745ad745aef3929a99b2b4be6. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USANG2265662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c66766571308ced738533f5e72a1e1d67d9e95024225c681e6e2334be8ffa7. 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/USANG2242005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2bb05d1f4582c44242185b81c82e59d39d6e4401c6457e413ccac0f6cc2799. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:27:28Z), 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/USANG2200442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5925eca565dafa2c8ec79f1e374d33219cea1ee6647d93308ce3888506beef. 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/US3DF2235602.