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 0x274a07d25992d491956e622d9c20385477d27760782e10d470dd0c16898aafbe. 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/05d67211-2ffc-4c51-a8a8-fe27faa4ec22.json and https://artists.proofprofile.net/proofs/artist/05d67211-2ffc-4c51-a8a8-fe27faa4ec22.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 0xa71789c4c6f77a54a4784ccccba026f5757ad51344c48dc5c6d5579c8fa4ab01. 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/QMDA72296054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae6d26695349932f9c5a70e3f98ff67d6e98a4ada14ce3d7f7012b854fb6a5c. 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/QMDA72296055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276ef56b9498dcd9582975a1b28be588f8f822f835a4bf37467c13c2b2426ce8. 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/QMDA72296057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897809e06cb766da1b3bb375f4cec3098f2a95340c607a32f7ca5f91cc8aac04. 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/QM6MZ2279327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8248f9d8d04208c091ce1cadae54ef7f822ae3f81920dfcd6eca46eef5e7736e. 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/QM6MZ2279328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9110bff9a74af8674ba54b3c5eb205d2c428c351d7e38e25a71e919c3e13eb16. 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/QM6MZ2279329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad8061d8019976eec35ceaf5e9701162ac3e7cc0d977389589e24945063eb9e. 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/QM6MZ2279330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15454eba25eeda3a2d322794341cb586451fe3f61952d56a1344b290c4b8e8f3. 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/QM6MZ2279331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca0cd6278056ed0fd36e58f03bcac411b9377029af6dafe971c8c42c9b58e44. 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/QM6MZ2279332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ae022ebbcb0bd752758eadb28129b899745f6fb05600167de53d851cc6a2a4. 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/QM6MZ2279333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a57b6a39a04c85fb545cce9b8ff37dee0b2b732b8213997d65a2dd7a8d494f4. 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/QM6MZ2279334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d9d74f34d411aff0a8dadcd85c0696dc8ff1cf92a19611f63d9efe437ea9cf. 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/QM4TW2114998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d6a0b1b61be54932a39f8e7b366117fd3e499dc2b8ea0ae2d84c2adc85836a. 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/GBJRZ1600040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b01d924c74e304c9f3f9142b5e3c04c091d5d45e5e3849eb47c4f333e8c3789. 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/GBJRZ1600041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e33bec2997c6f18e7556a1106aeb76e46879cb4d678365d76c3ebc00474bc2. 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/GBJRZ1600042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2f6492ba6b2c9d027dc6febded03a9cc996e711c0ec6bdd87761c745cd5c1d. 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/GBJRZ1600043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c1728593ccf627f65e43c3eafd8dd30fe76df39406e65539797f3524ab9048. 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/GBJRZ1600044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cd27265c05647c77cd380c17526696cc1f7fe37d02d7ab98e441ce868d6bcf. 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/GBJRZ1600045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a2610d0c226e676d53bfd7fb21840791133f28420d2e8329dabec53e3f2a27. 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/GBJRZ1600046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda2c40f9f08100584f96acf1e98815cf57bb23b795545ad3b66b3dc9afaeb4f. 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/GBJRZ1600047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e0392fee9c8d347470647a16417c59c215a55dee2774d205951a375425ea9c. 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/GBJRZ1600048.