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 0xa84e85b24aff32dd07922469af02e8db4131fa9b97c4ff0d59a3e5ae5fba1c14. 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/ee56e8bb-8f90-4854-b567-e4bdaf243901.json and https://artists.proofprofile.net/proofs/artist/ee56e8bb-8f90-4854-b567-e4bdaf243901.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 0xe6afc86add6066940babf5aa1ef6f60ac04524349586a22d7fe00c21dbfda26d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZFZ32334437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd24c712465cabf5fce0ffdb7c343009af830a566b97e5e5e12b5b5b8fd1ec8. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/QM4TW2372251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3730be8f6ba1df4ca247064f025154cda45f608cce230979c5bcf707c7603c23. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:08:58Z), 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/QM4TX2303947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8e6b3965069a4b2a3e3b9ddeded3a2ff2df27bbd2eaa95378476e08f0b5a1b. 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/QM4TX2353896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d60b95a419355cbed4f0175eb3d0780e3bdef220eb1e794adc5909dd91e682. 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/QM6P42318268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4250773a77cb10e5cd497e05592b9a5788133a21e0decaa561864e1923e5663. 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/QMDA62309811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a16cbbb668e5a3f6bd5adf118d79761e6b8de158370f2b43b305a829a758f3. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:47:59Z), 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/QMFME2326084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9601d657e717d0df7a374115a9be98e228d9142c950314900deda76f02490bb. 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/QMFME2374637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc202c765422a8bc814eb480a411f84ea4382672e8b2983b6ef992767810c8131. 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/QMFMF2354167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b85e67300a77a0c9d1e6c5ecfbd87967e8adcdf654fe83a0babb9605ba0c2a. 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/QMFMF2342118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106a3f4af84abcd59e3d3ca6d89c83f5ec7cba5776b9a3977ed3976ea7f3792e. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QMFMG2312628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3e417a30e602bb47c4ddaf6b1aaebf26d89d47037a24a3cc46110095cb86ba. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QM4TW2472773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4e88985786a8bb59386df5931bac6c805c06a1117df9c2f94ea8db79bd2435. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QM4TW2472774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3427a0f1ddb0c3076577b7db310ee6422eb4915974ee5a11f0d0f2b9d6a9e8a3. 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/QM4TW2472891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1040fec098bcf79dfa09d3c30088c5e4ac201cabc9ab6a98eea9efddbb06fc96. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM4TX2420019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f93e45571ea9b66c3adcf57d43c74ad6b6103dc2a2a74f84589808f383f2c0. 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/QM6N22471771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75fdb49e920268f3fd49eec4d8833b53ed2f3d07f99278c4e68a371f4c745ae5. 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/QM7282432643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb409fc04cf531c0cc68b0b2d0ef1a7caf9fd829042f494cda80245f7ab6b000f. 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/QMBZ92499427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec65fed84a930f2c8c84a4388353bddab7a38d469485124341f3f5b79098723. 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/QMDA62455357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6892b620727fe64fa245b0e22b4a7204f3d04f5f011ba361d404b0fbb3db74a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:00:59Z), 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/QMFME2405504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64415b2b6489302be69cf15eea19908bf6d5a944c93893d3bbdedf991f8132d. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QM3DF2402461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c5ad2465d9a37caac8186c2509d23cd815136a9b74e7838eeca5953a917110. 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/QM3DF2402459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5333004400bb0c5f38cc633ccdca540cc432f15d944280924a9d045975576504. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QMFME2478929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea112844fc9efa4da8c04475012c53acb7914801dfb8ce1fc3752d3d9fbbbc54. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QM4TW2576640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d3b749902ac105eaa5e2264e0f6930ab699347df8344286259b6724d435fc7. 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/QM4TW2580414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d3c58e643cb5ff8e31d88302e3c45bec4f91feb2f1093d33c012ad374ec3cc. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QM6N22536877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cfe20febe9a3f01c95f5e952f3b20daf25f02c90b60df4aa33c9880b5ddad30. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QM6P42581670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcdade98c4af34b730555c9a5fed50bc568c95de3cf3c4fc8a56508d69be1485. 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/QMDA72545572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9909cdde1c16a2cdfe2e2c167d61e22d8f78e4a17fc005491df7c8a26a82cf51. 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/QMFMF2507154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbd02dfd3c632111fdadb5b9c68482ccc2147c1909bd4cf64222683f309271a. 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/QM6N22519764.