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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085615462e97f6beae3f1f90110061f25ec255d385ce6bd2dc4ef8483c6c678f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7d5ff1b-9a80-4142-b8db-9637a87aa8d4.json and https://artists.proofprofile.net/proofs/artist/f7d5ff1b-9a80-4142-b8db-9637a87aa8d4.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b595409389ee35768f040bb8ddb262e13a88df6a9f899eb6d94625de5e3b035. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZDA42454181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c353fbcf09a530cc8f3f98dae71faddc153602171db3b2e2f9f177375f4018. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZDA42482096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a06810024cc8855f2f99b15490f026c91e74e7131cbb9e79d1e8dfdb23940cd. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:56:06Z), 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/QZHN72435941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a06810024cc8855f2f99b15490f026c91e74e7131cbb9e79d1e8dfdb23940cd. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZHN72435941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfece16f93225e82906501de88fc39a8c3e06750997ea4b681fecee88f9c0817c. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZMEQ2423558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c353fbcf09a530cc8f3f98dae71faddc153602171db3b2e2f9f177375f4018. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZDA42482096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b595409389ee35768f040bb8ddb262e13a88df6a9f899eb6d94625de5e3b035. Chain 2 (Bitcoin): anchored in block 957810 (2026-07-13T05:55:46Z), 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/QZDA42454181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69f70e4ea80810bf68f73a68b1df4e31403fd724a159ce4bc1c30ea43d3299b. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZTAU2408370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff970e0db94242b86b7f3fdfeb6cefcf94dff323fd38a9666d6bc65ec9cacd4d. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZTB32499713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb1ac06ee8c4c0875f3c6d4aa78ebd111db0bd5421ffb7310d072b76409734f. 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/QZTB32499714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d25344f679525a52cfa24946ef8176d3939d59a2d76fde94ad26432349c51e. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZTB32499716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69f70e4ea80810bf68f73a68b1df4e31403fd724a159ce4bc1c30ea43d3299b. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:45:22Z), 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/QZTAU2408370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b931893be602e9924e6b5f0cd3e06a0c3e1009e4d6807202ed954077e0f98d. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZWFJ2443698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1923011bf9a125a84693e3f2e105bc819c07e18049bc99622ff9fc0acdac6896. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZWFW2474749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515e69f5d1f720efe502154cd0f27b9402196f50cd4439ae235e7914c5501b4f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWFW2476355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad41c9896707716526e2ac2db8d0c770c659554018d7494d27eb1b1dc44b6f6. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:04:43Z), 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/QZZ7V2471081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1ea963a3601cd43d17da1179644f0ddeb663af450a312809bafbecc356b7d5. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZFYZ2544564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0f4e6d4b736139db69a46996af7c3c319a18dd7c0cf27be6b7097b7faa4a70. Chain 2 (Bitcoin): anchored in block 957640 (2026-07-12T02:27:45Z), 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/QZZ7V2469088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9f1b8acbfaf0d4c736f90b93d6ce09033c07713a031f03dca1a0478b9e6b45. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZFYZ2544565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63abb940999e8f935045e67e89025b295c93be8e380bc38fbfcbcc8a271a4f8f. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:06:12Z), 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/QZFYZ2544566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b25c88856d69acd0285cd025bfed3f9dc62a7d1b32fef38d9a3f46fefad999. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:33:02Z), 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/QZFYZ2544567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad41c9896707716526e2ac2db8d0c770c659554018d7494d27eb1b1dc44b6f6. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZZ7V2471081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515e69f5d1f720efe502154cd0f27b9402196f50cd4439ae235e7914c5501b4f. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZWFW2476355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1923011bf9a125a84693e3f2e105bc819c07e18049bc99622ff9fc0acdac6896. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZWFW2474749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb456bae6069cfca8956b1dfccb9ed2b33e8c6a55db518149258a7177acf8589b. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), 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/QZES82528926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc650fd9b38eff0759c8d84917ce67307bbda2b706ae4933708c221f2eb9287. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZHN62584817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0638cb7ae2da95eccadf84cb2a6a3b32ae6ce37a5ee5de8a610a130def5a44. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:32:26Z), 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/QZMEP2594651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8363346b23c8dc94554a9986d3e4bc6d811f1d6497517e98a260a288d74add52. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:53:10Z), 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/QZNWW2553797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0e25790006c165993398216683bb458488c3732701920f2823f54025ff3a68. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZZ7Q2595410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d1404a2d64a3c5b0ee52457f47a4c06fbab93302a6d4898c6f5e0a0ddceb42. 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/QZZ7U2570165.