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 0xee25af4f054e98a726069ceb18a6012009ae86a6879e30c4bc03e413f9951c88. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/04881005-2525-4fba-ba98-5d22418d3d7d.json and https://artists.proofprofile.net/proofs/artist/04881005-2525-4fba-ba98-5d22418d3d7d.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 0x7f28d44912a5bd0816ba28086a3b1fb191d7d4e336ee2a14532fc701453fec62. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GX3HH2181239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6283414153f76cdda6ab4bea94223893042bff598bb57950a3d6678b9c493bf4. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/GX3HH2181240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576e495d0c3d584ea02ea3d63aad4d18bb934178ab6786b3458a2aa59d2e03d7. 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/GX3HH2181241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6bf4a193b5c11fae4e75106d2f2b1277dff8c316e77a0fbe1b05ad0967b940. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GX3HH2181242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6300da16cce3890ee8f838efe5a493c2d8121e60dbae6e375d76ed85d94b8e99. 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/GX3HH2181243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4490e3d27b539f0b02ac93b5d7a37d3994e3a5744f49096934f9761766de696f. 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/GX3HH2181244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08891ba4f7b7201b0ac8258ef6f5885e18eafbf24feee9d34d7b7d8123544ebc. 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/GX3HH2181245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9181a257eb8cee8d172dcbfb5af341e77088a59b2af4ec5c03c19e60e2d2b1e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GX3HH2181246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521a504e146e01ffc58844e12d4c6d4c8820480d17fff66796027e5b8aa204ba. 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/GX4R52103684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff2b06154453510a675e334d371ccd1f4e49e283df99ee189f3b5dc4ed1d47d. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GX4R52103685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d1c7c10454ad8eabbb80d7daf546160692c55ca36e1c84ab7f95e92cb17d05. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GX4R52103686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72212b1e34d71dc50a3c0c547eee0e62faa2d782c54441a4d79ae00d28f7bbc. Chain 2 (Bitcoin): anchored in block 960305 (2026-07-30T20:14:59Z), 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/GX4R52103687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d0ed270a712e94d1d428591fd5e210916ae229dc457ee8097635199d6a56a9. 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/GX4R52103703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0259646a669fe057219b83ab09b668909754f962b95fa2ac237e3ed8c52a7d7. 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/GX4R52103704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf833ff36d4434941f11a4d0971733c71d8299085a42b069bd0e2234116df18ad. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GX4R52103705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df490d53929c2c6a1abe267562744e0cc87cd48843d29ae71b5c72ffc852fde. 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/GX4R52103707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f8a3fa15bc8db08f17724ba99f98d44dfd35cd4d981e343d89ea07b05711c9a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GX4R52103714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676e2f37824c842ea5a71761782b2be74da88d8ec03cf79e8670786e34e69f7f. 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/GX4R52103715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f611f1c074fe89e57339b313c9c4917a7e0b1d5cb28007fee7ecd885b463d77. 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/GX4R52103716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc114d3bc754622c23c499644e0b08252d8828a9df1825e9443ce129ec7f2cae6. 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/GX4R52103717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1151527372f7e8d46499d085a5b09a55512706673e033e0493e2458cfdb889. 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/GX4R52103718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a90462cfbc52ebc73a3e4ab291e5a8c244847083d1b363c84b857548dd0987d. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/GBSMU0028515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244ef15cb6f068de05843f8bb605cdd9363dcee245feffae1b12e9f8680767a3. 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/GBSMU0028516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118aa87ad0915553fb0c138b40700c9bb38d9e1bfb1bd8f637dd152a8cff6f08. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBSMU0028517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17591aae1b23e6504a5cef2130abbcaf378477503df7a732a7ce5f6417bd1edf. 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/GBSMU0028519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7764f77dcf5955689e136f7af66f5f5b437b8ecf8947732fef55691d620b250. 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/GX8LD2449993.