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 0x9dfddd1565447e0eaf62081a79c6bc177d7c7630e63273d0a4321f26820c9ff3. 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/b3a30588-ba48-4528-94d4-119f4a5e2bae.json and https://artists.proofprofile.net/proofs/artist/b3a30588-ba48-4528-94d4-119f4a5e2bae.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 0xe44d9301db02b7713310da2e225aa22c38d6eed1174676a7d15fcb404c8c3ef0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZES82207165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d2bb4eb26e0e5e54ed1755725deb1ff3d2aa91562fa3fb1c86057045fe6842. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZES82207161.
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 0x32fb4ab2aab02b17502b18dc4dee617280c8d9bdf6c9f8d0e797cce1b9524c85. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZES82207162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc1fef0b04ec667d2bbc4ad4e6b6f7ada787b763eba4201863b068e920367cd. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWV2219216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76247642649b04d67dec1b1ba112170cd5873524f5ad7e510d373209de7ba6f. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:10:09Z), 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/QZRP42235326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a131ce4a77a8842c861028c0c0c167a300d103999bf3029f2d2f43e49422063. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZPLS2494173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d399e2002305ec3dd483dd7c634c6c56f0a0d61dd20c29f1ac40e2ace16fad1. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QT3EZ2435961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483a700b2fbea056a526a2d80421d533baa06d1eb7942d4be11fb6a4db7eb563. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:52:17Z), 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/US38Y2503873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d79c31d4512b331e1bb778b1b4da7420242925a266f71534ab18614c09b42a. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/US38Y2520980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34808539c14911f01befec9490a984035c6290e7bbbc85ee8f0a993ab572921a. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/US38Y2535091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa741ca7824bbd5aac490487ad87630688083639739f660704d252b09bcabbc54. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTBD2561307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8142d31a2446ccc302e4c769bd099bd5c3bbdf65295b1d2dc69f6ec19cdee2d. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:06:30Z), 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/QZTBD2561308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241759055e5ed58790310682f12359cf225990c5fc2d67d5c2a3bd427b089921. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-20T00:22:26Z), 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/QZTBD2561309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc138cae4bb2c6a905c9f02578736dfd108849ee68f3b7290d3c46e2c7d46e4d7. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZTBD2561313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb5c091a5fc5538de9509d9f756c1b42eb00314e7f5eae322d8118facdee0bc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR9W12141776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3564f21040b3e1fba9429e014b3cd7131e9edc14fabd75f814d3ab399a38248b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN42134974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c474da0ba436893b7ef6b7de9398a8d6c23065997a924fd01d313d51fa1242. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-21T17:24:14Z), 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/FRR642400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd832961cff69d278108ae7e49c1a1576afbcc37add7f3be44fe226b51138e6d7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTAS2287134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d16d6a43690035d844ad9719e6cc4b79c32ab7e0d5e3e3c97f85a7e911a0c8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTAS2287142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19cab2700d40447f4496dfdeee746f15174d06db1d12bcab899916bf8d0c9925. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T18:07:26Z), 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/QZTB22205090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e61cbad32c594b25f579f4ba2c39243e72839e5b09c76bfd7fd2fa1f04a3e4. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZHN62203413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba337e80bf1d9c7cb3f03c231f7a1881cb47eaa2cdacb9f11800a169018955a. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/FRR642400647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5168016932e2d5dcf790b5bea60e88a5d6e30c8f1bb4441b80e401c48cfa48d. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FRR642301771.