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 0x58cfa8d124ca90c17fbcecff33402d1ea56f8a486bebbd63352c7ab09773d1d5. 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/45262c74-ceee-45c8-be01-740c2ff35c5e.json and https://artists.proofprofile.net/proofs/artist/45262c74-ceee-45c8-be01-740c2ff35c5e.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 0xbdec8ad8be7bbb15d12a052127309428130f5cf75c13664c63108fd431f9163a. 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/USHM92004666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcefffcbc4d0c35a0923ec606ca0fd2b00d4c83045abe1016781788b99bb81efa. 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/BCMXX2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85fafc3df4ee0116fb9380b663d7b759ce828ebc545e1b7b89bd3c29fb0d589b. 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/BR10K2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ce1332e620c6da557eebc3972a518c14aae048f99224badaaeb8753e3874ee. 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/US7VG2527864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216273783e43dfd3ba6dd2fd47ff7e22159a80650947c8712d617b5467650cd1. 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/BR7872300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1865b8c9dd4cdd5050bd34b4dc7dd8fd52604a785ca3afeca2a1cdd5b841505. 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/BR7872300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a26ecea1ce60331307a3d8b70337a8debacbe2d58068fa33716d2fbd62696fc. 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/QZNJX2326804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e05dfe5bace6b0d6bfbe4d31b5f9dafafb1e319ea757c3926afb625ecef7563. 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/QZNJV2383562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082b67258bd5f8784030291b9614b482308a0e2af815092f0fb27aebab7a291c. 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/BR7872300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc052547f8108002b11c3e7e52ec60de75661fc36bf7f1e39e1fc0a0e350e8b. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/BR7872300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072a6fbbf91f3b1b639fee7645ed6b708439de58f8d786a3aaf7d5f7e33a4a25. 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/QZGLS2303316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce5eb26622894a49991d96c54bf23c6709354f611c959ff2ee84f7c930353a1. 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/QZW9L2242213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53581b8a2e172e1454c4fa4b5734dcfdf75178ea4ee42d1e8454714f9cd07154. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/BR7872200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07dee5d8caad993d9261a85a140fee6f1e0ba7ddeb2a29d263bb8ce40be60a3d. 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/BR2KZ2200041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b63904f09b2c277365debbd9a807fe8aa4f5871b14ba8151d8f6742852fda3. 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/BR2KZ2200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e43844a378aea2d5cc631f865e852c8f07387dc700c5eaa8ba26a6b4950422. 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/BR2KZ2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9ef59421579f1969b5a7960371bd8ec8ddb165e19bcc1960097bf5c436cc8b. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZHZ32029776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4faedd7207f253ac863c424f13533788f7c97d5e6b7abb8aa8af8b7f761f82c3. 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/US7VG2020773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311ca4af059a56966f1cf448f6eb5bdc919672ea91fce085ca1a70c62fab820f. 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/QZHZ31947063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63169e1b35f2aaee2a24ac522219a204d409c399d51332306a81e27840595ec. 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/QZ5AB2093629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ebdd8229324a3fade1ec723dcb5c61db2d1b327c16f6f25573d5486d0602d8. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZ5AB2093618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f25c43aea14e42130891bc22dbbb5a1504cd1a0cd4a428a8aea6b8dd4cfa9a. 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/QZ5AB2093646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8873e7cfd96b707c374f1092f3f7e901eea074376e8f4131761f24c5cb5da6eb. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QZ5AB2093577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07fcbe185849ffc7146f3b2cdc2eec0d54633a39bd5840bc9877c91a96c6ace5. 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/QZ5AB2093598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82dfc74c9e2da80102761971dc48d603bdbf335f3d81fd5b8c9a43822c5730e9. 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/QZ5AB2093427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96768375b7ab65f0bdcba66db6fe3768a39edf5e81ce6f3ef1f32f55399bfda4. 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/QZ5AB2093491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd57b2b9e5e6bf0d6c9547287c4649525ca3e900a1fc608f0066a760b1d6483. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ5AB2093393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f449eab857ba85def674ca81b1084fc76a100d7ec06c8fa119b6cf54824212. 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/QZ5AB2093386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd733d23b99faa067daeb472280c9a6c46a0301b894d623f53821a41e7aa7c661. 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/QZ5AB2093535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e30752455de75293d7182123368158c7147eb620efacf358734b7aa0c6010b2. 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/BX8Z11900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab5eda8e69e0ac71bf7a0eea93835fe45f7863e7357d91c76fbd23dcca3a6b0. 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/BXV962100002.