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 0x763fe12fdefa6176876c14709708485907363da6936d8b09dc0ed9e47ad574b6. Chain 2 (Bitcoin): anchored in block 954555 (2026-06-20T12:10:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ae834d45-5798-443f-b843-79616feaa289.json and https://artists.proofprofile.net/proofs/artist/ae834d45-5798-443f-b843-79616feaa289.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 0x030dabc5122adaaf88988ddcd405c690c466f26f379830a643f4beae903222b2. 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/GBMJG2324409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f5e5095edff021b6a8acc22c7c455577a70e6fba3578b4adcc0e2e060bd326. 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/GBMJG2324410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62045c6dcd97ef8e3b1ca729f356a0b4a3b51b5043e08b394e5d357628a0ebeb. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:28:53Z), 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/GBMJG2324411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c8545e176b5de325e434e74ab3aaf96a889a6d4ec46560bb9846df5e28d3c1. 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/GBMJG2324412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1686cbb198960c27df4959f347299189b27a492db2f3a2076869aa62edf6760. 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/GBMJG2324413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4f55259c0794fa77832c4b962f3ff0fe8bff6ffe48d84207e920a718e9f813. 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/GBMJG2324414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd453e62e22d8794b6a2dde3c1c64a8904a80fb92fbee14a619a25f7a2adaac71. 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/GBMJG2213239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25fe35fefdcb04fa36ba2d34a28968181164c3bb4bf8ccaa16dbb5b5eb55668f. 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/GBMJG2213241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef464e08798dc1f13d016e745d7bb58aeeea88fb3af7366d5829d656d55089ec. 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/GBMJG2213245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6f5f42e2115ad42d990d422c4b460f838224a2062aca7885be910728386784. 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/GBMJG1902651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1f77881256746fb9ff218b32cc89c744589c069251241b4d7a8b8c5c3b0373. 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/GBMJG1921053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20629416b02bbe762864edc1454954d3c34c034ba6dbaa5e781cd7f3e0f469f8. 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/QZFYZ2201201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b2ed6c0334cfa9189653d78b2380bbb54df6ffdf3c92ea457070f2b40a9be1. 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/QZFYZ2201202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200dbd3a81219d24f507555b21e8bca81c98435c8d0c18d875e2fd557edb1a60. 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/QZFYZ2201204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf581adaead022db14c8d24d6373962325e52647504413c042fbf30004beee05e. 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/QZFYZ2201205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2ad74a4863a75d3f75d540467ecbfa1b7263b54a5508f82e5123323866d4ff. 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/QZFYZ2201206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b5d4d3ac744861d48d0a1664eeed657672feef22771191274b6febe4c29309. 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/QZFYZ2201207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733271156df89da7eafa4f54869e1d0b22b9495693cd9d34dc88ae6377c55d06. 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/QZFYZ2201208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05bbc16860345368c619fd0cba0e3057026225e34ba4552283c321051222b475. 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/QZFYZ2201210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd951717484efb624936b237ebf8e87aca44e0eba8e864425dba926ae2da7877. 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/DKUM71800748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15767a60f51ad440554c07f3e9d3fa28225f640d01175629526e2fff20faea6. 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/DKUM71800198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a02e07b9ce72ca8ec0df0f2bf86d10d018fb3eddda31b4a2c3a7d0649cf1b1e. 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/QZDA41978144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041d26317d5e2251232d719234e3664d8cff315d749ad39d9ff78736892b4752. 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/QZDA41978146.