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 0x7d04a9f9dbf4bb7b47bf37c4d951cfd860084da183f1975c394acbb56634c0e1. 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/e77c9171-6000-4a53-8ee4-09a65114db03.json and https://artists.proofprofile.net/proofs/artist/e77c9171-6000-4a53-8ee4-09a65114db03.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lifestyle2 - Latin Jazz Vol 2 (International Version)
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 0xb6a222568fe88577047a8e7a3db1736a361b2293f4aec1799efb0424f6281de3. 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/USMC17112503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01c40aa924c8e29d8c157e4f78836156a14b8db8bb886430cb08a2f15665cdc. 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/BRPGD6700023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a827b83c5f6b3ca749917738b45f7eda317a4dbc9724003f5403b5596e5e19. 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/BRMCA6700211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120ad521a8725afb9608bfa36000a2e173394c1cb40b961f9a38e515852673a4. 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/BRMCA6700212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6dbf542924471f34c96255356c9e142b38f3fc99266d05bf230e54aad89b45. 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/BRMCA6700213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf6127393b9439f2e48f8c0ad0a40f1b7637d92d377e78cfe72509f87cd8111. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRMCA6700214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac0489bd2b6b7d194caaa9f9ca710df77de9fbebab5a1750883b104253664ff. 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/BRMCA6700216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbefd93b63c968e60c3750cd273c97aed3f190373d9ce7120f7e507df421425bf. 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/USGR10110994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cebd12a4fd3ca76235ee46dcfa9daa4fe3da201fc7250edb5b33348b9d1746. 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/USAM17100302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a696a58c057171c0c652affaa29c0a239b59fb501d2cc86e7e872c5580d47a3. 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/USWWW0130139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44faacbc2bb71fb36b1c5d5e63018274fb3f1e90ea619c3ab6f33915143cdb75. 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/BRMCA6400057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a84be1b35794eae13b3f5532f568eaf5f444b148ff598eab53a808565d82d0. 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/BRPGD9600303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4140b574b67ece4e624e9f22cfa00270e318776be1452fb2b3f5f4ee99ac82c6. 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/USC4R0513739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9d97404cf03e5c55af3b19ce9ee3520942d76a8005bbffc0b87ab65c97d502. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/USC4R0816004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aac8f967eec6828f0763cb7843032997d82af93cb907fd851645c5af2cf6232. 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/USAM16974754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4ab334a6090e3cf7195f6bfdc5ef44f975406231b09c89893f06a2fd0385ab. 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/GBUM71031285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac0489bd2b6b7d194caaa9f9ca710df77de9fbebab5a1750883b104253664ff. 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/BRMCA6700216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584a5b1f97260fd3130aac8088745b2240c89559f5da1c91479248977e6c22ef. 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/DEN120407409.