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 0x50baca2e0b4de16bc656ada34fd72c7466702c484ce5d4b9b269756380c80475. 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/ab80758d-e655-45e3-a962-ccaf6e9d04b9.json and https://artists.proofprofile.net/proofs/artist/ab80758d-e655-45e3-a962-ccaf6e9d04b9.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 0xdb93393fd111177895682a75141ae105d2c85605e40406b059de75fe37844a50. 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/SE5752104255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf4b4bcbb8d51629160a33b57ea9ce1f3a77427dc17e2ada88a11db84d74f02. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/SE5752104256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8854d96c2d4a0fa4f50a768ac9990cbcf7465e66ad2e878a1b6b0a7c34a5ee. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:06:12Z), 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/SE5752104258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293362472e7a6a44c5ac2a28fd5c766034a24516b3a48eef3d3f05d45e813ddf. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/SE5752104261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a12511d9622b792ecf8f0e2a2fb8b569c1b1c1178600db4bf32a3d8fef191f. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/SE5752104265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694f241f5e3bdaff1e77bf138e776e3627d8a048a3badb999fc2b192940b6068. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/SE5752104270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x151cd4e87123c081ab17c9a2d416ecca6085797abd2d83ad0d4dd54581e5d9d9. 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/SE5752104271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3075e71872f20fa2b10e8c5c88363dde529f0d3f470c1e91a259e31e6c20c561. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/SE6A92177031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8158db64383608ea7b1c2c1553a7fbb60c8f9542441bff901abe2b6d8c050b0a. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/SE6A92166622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae1d0f1529e3e760e61f40daf506c6bdd806a7ebdbb86e8b8e372964c09d7fc. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:07:52Z), 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/SE6A92166623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f31da58751127f9b3344e5894945ab5d13c8647858517b9f680e513eed3b2f6. 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/SE6A92166624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23dde51b5897b27ae236e8fc9cf792f994d688c00f3a1ff2c6255f6c3fa14b3. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:52:01Z), 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/SE6A92166625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa2a5021d1203a116a16779fef8621fcfa65fc3df070e8f2fc8ea9fa31d747e. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/SE6A92166632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59739744e542b48f7cd8217ef17ca13db16732a464da90e6877db196f1bea431. 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/SE6QE2180890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb49fb4fd4a10a8304bd677d8963502d2bb89c016203966dc9b342b6f87f982d. 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/SE6QE2180891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755f52c4104ba9de8454382a69577304eedfabab750a5da014ef4909ad4beb47. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SE6QE2180892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe863a1b16c6b4a059392088d264368c4a6f9c69e4a3636b762c8dbea5fc9d2f6. 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/SE6QE2180898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e3119356f48a51b555bbf8c5242cb8648f35352c1e4bff7e809f6166dc3388. 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/SE6QE2180899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeafe93a375972f45ae8e031ed1bf3a2e1af204f4f27631ed6a0a2a59b2c23de9. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:43:07Z), 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/SE6QE2180900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b486e868a46ee4d8bc5ed56799e5b37466ff4cf687d616a42c1f2e64c54890. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/SE6QE2180904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e9c9de974edbabee8d8510f26f2079f636753e6dce486507b2f8b8defa98a6. 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/QZ8LD1994260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cff19b1ae79602c5c5626787a58303a510e13eefd7d6c33c120a75163354fc1. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:52:52Z), 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/SE6A92170719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2609a4cd0d51f6321fdabef7c7e5320afb23932852683a2f3a676fbb76b7b23. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:24:37Z), 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/SE6A92170726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868e19ee9fbcb2d14ac4c665954526c713bbb9ec6d5cf2571ea5b2d448d79a4a. 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/SE6A92170730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952e560048ecd408a8f92ca4a3a4fcffc0b34351062fa40b0a70b0bcbb4fb41f. 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/QZDQH2364911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791ebd9190f4eaa87177a3e4caa4576b135f06105834536e413b0892e79d0dc7. 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/QZDQH2364915.