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 0x3d5bd2e58faca9f7954596bfd9418a463838d303f37c9d12658321f40265394d. 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/7ac62c14-6186-410a-8d1b-43db597ec571.json and https://artists.proofprofile.net/proofs/artist/7ac62c14-6186-410a-8d1b-43db597ec571.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 0x2fc1efaa4b38e52ae724d266fcb7f43d9e2511ed9254b0f1df270e4daee26e7c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZJG51980331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2872baa9e1974cac026d8baf5d3f770646b394cff693ca6ff0503f27927328. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZNMV2052082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a1464aa68a5af41131d6f9c172ae530312ba436d5be0d047100cd7da9f7b45. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/USLD91763091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65296b73872516423f70b95ff1540be6c8c722ec2006915001ba20dee46b350b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USLD91763092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd152709b4878687fc269e8c096a4bddb52ddb8c54a69d1d2e07e0b3139233aad. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USLD91763093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917716e6b8a6298ed4eba471ada0c41148fecd41b7302a41301544920607a74b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USLD91767885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca89364532c465ad381adda98307a02630baf1e33b7742eae886602c435895d. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/USLD91767886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a3af8971e3cc3ce9eba22d962c4e8c31dd268252dcbb1323d4f7b3f131683e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USLD91767887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f406d22051c9f9c58caac9e52250940c33f49665bbacec80992870fd36bc44. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USLD91765646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a54f52d4569bb360d15cbaa90a0d626970bd6f0d381e727579da13a1ad04e72. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USLD91767891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aca4f461fe94e1d52a57543fb2296141e4de425df07ab074babbc27a0ae2fea. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/USLD91765207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a2e3e8e2e807b6708a4c9464cc586bfbc5bfeeccd8cff3c50f278394e7979c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZQAY2550690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a2e3e8e2e807b6708a4c9464cc586bfbc5bfeeccd8cff3c50f278394e7979c. 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/QZQAY2550690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba22c5b7a88a83fde5d013b66e2757a1818f5972cfb45c1ddbd402115929f50f. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/QZQAY2591820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba22c5b7a88a83fde5d013b66e2757a1818f5972cfb45c1ddbd402115929f50f. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZQAY2591820.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc112992b0456905f9feb14f6618294c5a2f98315720c4f82982ead6381986dc5. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/USLD91774546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba22c5b7a88a83fde5d013b66e2757a1818f5972cfb45c1ddbd402115929f50f. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZQAY2591820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e97a4e257745244e1ad9def1a26578947dd875705e832cb26c21d3bceca7a9. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USLD91774547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd868c9b02cf4d6dfd3b6a06c726a681f5ec69c7a8068cb245aba6d86d687c9. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USLD91773484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8a346d01f69c0a44107dd9387f6e73da1808f04c095bc9dfdc6fa8f82fe1bf. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/USLD91774548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8676096366d3034ea92419f25d323558318218a735a273670944e3abcabacb. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/USLD91774550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92addbd6f140fff9359abad9f20ceba8df709d9be2f262cb17d1598077b325bd. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USLD91774551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b78af029543186d6caeba6f5c01ae73d9808b33eaaa588e7bbd86198955c51. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QZNMW2537133.