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 0xdfd8b8f73138d427b95d1d81a1b0939112840ffd7763e09d63fc66f3eb9d6a0b. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/847d1121-42cf-4c35-8882-e8e3dbf1df08.json and https://artists.proofprofile.net/proofs/artist/847d1121-42cf-4c35-8882-e8e3dbf1df08.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 0xdbc8f9b6feb6f635fb62fd91c64ca6592898163fe911c3701ac5d2ebdafbcd18. 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/QZZ7P2429435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680259275b5781ce390c3fedbcc2d202ad8a22f822b7b4cbf8b2dc87e312f62b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZZ7P2429437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7255218c0509d9d14a45e62085ffad71f6ca0c576d09056ac3cbee704b66a4. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:21:43Z), 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/QZZ7P2429438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61171b30b796fe59dbcc813a3d1f97c8ae38be7ace09a2f908d06c1e939090e1. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:09:25Z), 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/QZZ7P2429439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f40c9c5423a3e5e6b86cb8e824a3fd643e7d2e0cec8b23d772482be9818c6c. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZZ7P2429440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ba2e72d592484efe8caa67f8786239279e7bcb0d76d763a851b6df66224aa4. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZZ7P2429441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05cf71903f01bd419b07afa4e133b83951cb77ba73cdd05b6df42550983ae2ec. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZZ7P2429442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220e0b6f0ba3aadd799c423230699cd0b4cc84b888c8a80b80c27d80059cc2f9. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:37:10Z), 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/QZZ7P2429443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69fa55900f2eb9387a638f077e2a5d9225d2fb319a9053b700ed432ff92acf0f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZFYY2588062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e77fc0d2e323832b4cb065bb9081d27683eac606169e69eb6b9a471f4d87cf. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZES62530885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5e5917767c65630b1aa2a35a3c1ea5833d90d754279ed34712a38b78435718. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZES62530887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137910e3e4cfe3c97a31bf46a5fb22c5652ea1af3a4f3ee2bfa84ab2e0bb2964. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/QZES62530895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ef6ba7990848aa96d6a8598e5e07445756a9f8ca9e11e65e0e3df9bdb98363. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZES62530898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2614cdfcd1d6bfb6173c580e5570ed19d2028643eecfb878dc9474974d7a9c95. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZNWT2567564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf7a89849bc64df7e1b721707880ff1d60742107a685b9112bde026c6093c1c. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZNWT2567567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3db96c5ec727a89cc7e9126b851957f6cb44b2552cfd25e878a0f39aa585ca9. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZNWT2567569.