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 0x029c48a193891582aa62a9f45cfc1581bd612279164cd97f6ee5e00a427d32b3. 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/9b46770a-68f1-46b2-a874-11e7afe98f7f.json and https://artists.proofprofile.net/proofs/artist/9b46770a-68f1-46b2-a874-11e7afe98f7f.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 0x2e6339ac43932782b74eaadd5dcbcb75bbc95a76e19b41a4a88971f1f23ac969. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZNWV2596104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1634734d92e393e8ffbe0cead119f7b814041640192ab79355f7254cb7a1c1. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZNWV2596105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb7780974f0e9dd6261e5a6875cd5903278d1860c3c740c21129e1f9e76cf25. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QZNWV2596106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9da70412ef90a561bc320fa25bb27f75e126ed0a84515fd23d765df47c0ee2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNWV2596107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09da698b1f2f23b15e9f8c0dfd9b446db64a8010ae29b66090ac5295da7eea3b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNWV2596108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28741b3a298bb5b97e3118f50eab39d4c2d20e812f716895f7e66b6d9937fd2b. 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/QZNWV2596109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed723e72fffbe0c656636fe71eb4ce7a2e6b453be8921eb2c839a1282187e226. 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/QZNWV2596110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223202a70ccacfbd418190a32428ae19080916c49309218d948b89915771e6a2. 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/QZNWV2596111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877c7a3f618719121946309ecc04663dbb4aee4c691e8f3de0042361817807b9. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZNWV2596112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f18b457094f86bd959acc517ecb271ba0ef37a73c7d99dc7bdf323e08a3064. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QZNWV2596113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd268151052a3da918715ea345154c6faa1140e5e0a7fb8c67c0e3b9a72369d42. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZNWV2596114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e67434ca79c6d3ffb06ca5747751f0b6f492d3d4ffa81c876e9dc411dc44e5. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/QZNWV2596115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b77e6363dd97d6c18874406ab6df5b8097f2df9f5bcff72f7b6156af35df30. 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/QZNWV2596116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73105ada21bc66ab1b95bc120ecddb38ebf3038b8be9ce0370584c9b46094a6. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZNWV2596117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a8af71ec81ecacb4b9694a8bbfc8573989eb6bc7c4932c73f790fc55a5b5a9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNWV2596118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586b4f2210e25d4a148bae6bed9c718bdaf45fdb15200557cc6275cfab038e02. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZNWV2596119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04da7ccb083d000a565041989be201ad1116d2e203a72340a7dbd7441a6e5c8e. 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/QZNWV2596120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4cc56b80805f369c1b89ba94f5552e5f1aee3d23127f9f4f5177bfd9ad5cafc. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/QZNWV2596121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50ecd67df5f0ea75490b715cd0d58043aff418bc57530e2e37d415f3dcdebe2. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZNWV2596122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8498502e5e526aa70490afb1005ae62735d75927646dcccd52da7446ce5070b2. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZNWV2596123.