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 0x1378a7991c7335ad3a8fe5cc562bceb1220730c696dcd93d435d693209c66122. 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/89ee8f83-eab1-4d92-8117-1cd5a9cf9b8b.json and https://artists.proofprofile.net/proofs/artist/89ee8f83-eab1-4d92-8117-1cd5a9cf9b8b.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 0x203e126b1f9ac55b39d3979f3c6113c67c44fdd6fcacdccbd992e79697c3ebaa. 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/ES09S2100249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5955d55ab0fdc2f1ede14f9dc417cc17c2bc54f00f06ea8b14c0be13de9400b8. 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/ES09S2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1cc75d7c4ea4d7d758c2565dec930a0d98f5ddbb95d30275f9bcf62468367c. 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/ES09S2100061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203e126b1f9ac55b39d3979f3c6113c67c44fdd6fcacdccbd992e79697c3ebaa. 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/ES09S2100249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc805a71fa7f66ab028b1fa12bfd82ed3ea844b7c22bc3ec57611287f974fd36. 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/QMFMF2114704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa552d8960f675ed566036b7bceb9a68c97f7bd00f4e541d8aec8a42c042d218a. 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/QMFMF2114703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38108508df18a68ef1f03a51dc260c13be915e1064ea9991ab61434b6fa4532c. 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/ES09S2100352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ae8a297133d5c26fc90828f53ba052cc746296fe5b3f1a96c3710a7b1e7928. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QMDA62295302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ab8c5672f3cd0e1140e08565ae46cea013700a233b8c1a047dc11d42dd49f5. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:49:43Z), 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/QMFME2216735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f35e355356bcac63495b3e1cbd8161d8e030440194a9bdce90822d03bb6c63. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM4TW2337478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b826e2ceeb9329d71d199c96823cee37af0925f5c45987800cb00a45e8ff97. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QM4TW2337479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d52dd8148f3e19bc23f413ba877d69b491c68893ae4d30ef7948bb4a8ad8a2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QMFMF2352986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f212b49fa8a34aeccfc1b06be9f43efcf67ddc32b01b3f8976b3cee5935407e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DGA0L2465048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e7f6adc9bf46bb30818502b6e48f0c8d8d339ab638616fd831ad0cc9161baf. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/FR10S2518970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4480296eb84fb7de6fdac36064d74a1134e4a247dbaa664dde36efba1bd3f8. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/FR10S2518975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1169cfc24a3901d35d3a33a7eb00d0992cf670a639df803ff6673cbda6db0b. 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/BK4DA2315663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1c772c399d2cceb7e43d0d2e1b4b3a8c4af5858efa3a3972aa2298366a3a83. 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/ES71G2151855.