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 0xa7db43981ca025504daef8de650979c5779d6ffeb958386d3fe5439947f11a3f. 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/94036556-cdc2-41b5-987d-ef50138a7900.json and https://artists.proofprofile.net/proofs/artist/94036556-cdc2-41b5-987d-ef50138a7900.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 0x05c5edbeffb7205f2cf6cb234ceee45d5cc6ff4b3105b5c4ca417c2548c03dbd. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/AR8TN2000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3c59c5929ffdf4e316e32cbe5f2ef96e06967a2b590317d043f7bf8814692d. 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/AR8TN2000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c5edbeffb7205f2cf6cb234ceee45d5cc6ff4b3105b5c4ca417c2548c03dbd. 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/AR8TN2000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3c59c5929ffdf4e316e32cbe5f2ef96e06967a2b590317d043f7bf8814692d. 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/AR8TN2000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76d8028163f65659b913a3f20c0bd84137fda791f98aa8754879b5a69c76e37. 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/AR8TN2000641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2936eb92b8d815c664b8a39f3339f83c411692bd42e869f3fceba1736d110aa1. 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/AR8TN2000636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76d8028163f65659b913a3f20c0bd84137fda791f98aa8754879b5a69c76e37. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/AR8TN2000641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d21e97b0f92077fa00a13e4cb37aeb14b502e47faaa713a0c495b0e38ea3b8. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/AR8TN2100407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe333a11e8d013ff7cda7c2f50cfbf8298c00ca240498cc1f9be39d42753ff642. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/AR8TN2100406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d21e97b0f92077fa00a13e4cb37aeb14b502e47faaa713a0c495b0e38ea3b8. 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/AR8TN2100407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b14d091a79f429695c11aa464cbe0ab23203264a5778434505113619a24d86. 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/GBWUL2431610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fde25af6a986d441157cdfb264c51038be7a87e81605a2a53e7545d4e167b3d. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZHZ42232144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9c9ff44ccb0356fa203505d0f1fb2857110218de3ace83f3750d1f7b50319f. 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/QZTVM2130179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb690b006fa5df2c31e0fa7071d2a3c87007aa63fd47306cb42f3fd785354d182. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMZ92441603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6991f87b17991c7f2fc1bdc0b30ef3d6cbde7829ff410b9cc96599671fb4f6a9. 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/QZGLM2435869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f470f7672970f1e049b61da7b3381349828fea915f8a1d1906bf9ac9bd0052. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/AR8TN2100605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9638de5daafa423a3d01cf44a2bd8cd346b17fc41607344d6522bbaa0c8a204c. 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/CA5KR2077774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b867dd16ffcaa7d49112d1fc1be16c95b37654933e64e40b5b6eeedeaf92be. 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/CA5KR2031544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7943fd12bd445a16df969c35e3f5a0b1c520183e5d130bb85b5b75cd099048df. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZ5AB2343897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dba5f92c3c7c3ac196b47c168678afbd86116b75db237edc730c16f0fc9cb00. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZ5AB2343899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb88049aa15b9472d54e83bfd260065559ec07180695833b12f786cac8be7aa. 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/QZ5AB2343903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43380b95fe76d36eb6191fc90d7f1b207c1e07c1dde1775d6bc8c4532e053355. 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/AR8TN2000405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c0b509805e783195ce1d5bef524ffac49a014b8756027994d9516d672ea1fa. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/AR8TN1900553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d3062cec15319e431dd49904506ea5be109ec2c98eed60f49b60926e12d475. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/US7VG2399056.