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 0x175f29a4f2fcb36ad86e2488a8b0bfda3b2797bf6df5847b2aeddbb26b92c7d6. 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/ddee1d50-9231-48a7-9d72-9a09e3ed151e.json and https://artists.proofprofile.net/proofs/artist/ddee1d50-9231-48a7-9d72-9a09e3ed151e.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 0xe832c6abd9ca3810158f7d941c253b9cc6977538c8ad368ff9126d9da325af86. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/AEA0Q1854736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e5d20a70cf8bd1c5233b7cf8715586f9a5faf04b98d738cebec9e2ee6c2952. 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/AEA0D1857320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c6257240a7f5dd644c4008817b34f8e9f648e77beb8e055f06e5c9223e37a2. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/AEA0D1858691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df5302811fc50d19462f655ea06cfe7821ec879a9d6035c6686bf7f090df3a9. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/AEA0D1858692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fae4e2cfdd571e2b3ba73158c1bc4071766a5e3a03ff958adfaafb45f01fe64. 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/AEA0D1858693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04aca30734897df7b515db07790dcd76d7b692e1f54eaf9dd4260204aa6749b6. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/AEA0D1858694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615300962e79b88d5dba4036b667354230b6624c5fb6db6eb59206118695983d. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/AEA0D1858695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd128302ff52486326d139eaa5dbc3cba9b33bec76d1bf3efdc2a2363e81bf5e1. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/AEA0D1858696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d0478a31d2e5af283c4e589bd6cd945626c8b6ef89c1f5de2710f07639fb5a. 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/AEA0D1858698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e155547acc44a824e4b730b8d9450882a8884d3c8b06ae57982b80ba13d2cc. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/AEA0D1858700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d92fabe79b77a609916bbc64c091e623bfe4684b44b5c582a57f79732e0e30. 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/AEA0D1858706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97cc92fb68e05ac987a27095769b6489a2431a8a81c34f146400f838e9aa0065. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/AEA0D1857143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb36f6ca1791b5be169fd0b1ff2bac17102958053000be72ec161d794b83884b. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/AEA0D1857144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f29831e9de3bdbb61df7df7bf501eeabaa4b1b5affd6048f67677c1237a497. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/AEA0D1857146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8d662186f561cda9059783aa5ccfdd651e8d2a68adef682acccb31f38cc52f. 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/AEA0D1879629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d66a51fd63e85ebc251e0f4f20745f16080d5e793d7cf75849c66b1abb013bd. 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/AEA0D1879838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f13f9f549f7bb40e5ecc6971051d82a1b91874db6e92eaa1b2046ddf786424c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/AEA0D1881006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1766dbe4b30f983412cdc07049b0663dcf8ceab2a076a187ba384d48490d686. 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/AEA0D1881854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999a23a90e72b00986dd5cc62cd3e2ece34d22f8407c3574b1f6f0d5aeffcc5d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/AEA0D1880997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfcfb3cc3407b83b69ab895cbfa2e9fb0620ede14a5d5efd572692b30938ea37. 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/AEA0D1881858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac36ab72b4a4aef721cacebf4ad5f072cc721c435c76a731247ac216c37ba162. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/AEA0D1881014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0abe8cc23f96e9a90e8e7de684fbe4108350bc9a83e7359c5cbc0f922bae0d21. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/AEA0D1883894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd640e1c79eba945776788e44b33f2c64d0c2502501493d13a396d31be2dc4a45. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/AEA0D1935639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac1bf3b44ba3b5562537d4e59d4dd397605e28ee7b9c3bf844dc3e9db683105. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/AEA0D1935324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4425c7fd4a38aa09c03d1379a45891907a0daec6b50d06382f1d73c1cd13f933. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/AEA0Q1978799.
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