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 0x9e1ff42c1ef1b7cbbeed29457938b9350b610d04dc481cf74e713e246977a59d. 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/9e29bccd-8c2c-4127-b45b-b17e3369cbac.json and https://artists.proofprofile.net/proofs/artist/9e29bccd-8c2c-4127-b45b-b17e3369cbac.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 0x4e629834bc433d807f0ce5f2d8b39412d066b596f16df528506ca1153c5d1965. 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/QZZ7U2563399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2b0ccd92134b677767c3549b26ea97c2b18eac5046b004cbdbafd1d5dbfae5. 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/QZZ7U2560546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4b190cef3b17b2905d4f3faa8e8d60f89f7313edaa1bed39aae598d89806b8. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:06:25Z), 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/QZZ7U2563400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda3caa7f0b774adfdf5aa8f6fb592c3d8adcf5c3fdc55ecf07e6823203bfd44. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:20:14Z), 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/QZZ7U2563401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7750a885e1e6d662aaa79480cdefa80dd405221b605fa661bbad2d85829e53e0. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:06:19Z), 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/QZZ7U2563402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec8c0b9657d0be46ef68b9f4e4958357fa1fcdd0ba784b4a9a8125962c4c60a. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZZ7U2563403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd92c49f02c4b81af0c651a09d210c06ff70b45ba9ea1387206dbff5908b9038. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:41:39Z), 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/QZZ7U2563405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7812da58ec30b06162c81b5951efdeed204d9b8a12f5650195a05f7d6d86a527. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:47:48Z), 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/QZZ7U2563406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cfad90075004604396d3e89ae268940b40f7479d7a2bf450ba70adb06e14a06. 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/QZZ7U2563408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94283b5beee37d8007c8927b991b28a7402d586f76a390d1ecf8cedb543e221. 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/QT3F22548667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b593094e6943884980845c9748ab0dbab44c689f00a419c9013d5df5598dea. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:57:53Z), 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/QT3F22548668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cfa5869329e96a056dd49f12d8ae83d73d22006a75c89c34ab2304f9d8716d5. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QT3F22548669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89bd602f318ad4e7c0e7adb75f949ffe459a0149ca8ae9bd8fa0f32df2bd3214. 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/QT3F22548670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042bc041b7a1fecb677f8d209df1ff31e859f26a81aec72302104062daf5d0f5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QT3F22548671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3037c59b8b6b0133b39ec4646936ff589d9afc646fdbc63efda3cb53a2180318. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QT3F22548672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1da33d88c3587c860a1f9a8dd247fd761d0647a7c5b25512e19515c621460d. 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/QT3F22548673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a3a8da0d16062f96fce79db89ac12a73a5f2de5b4a3c9325d387af771ed4c7. 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/QT3F22548674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f30c2fbef43fcb93daf2a4dff269a355ff004c342d076eb5f3744596dc8131e. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QT3F22548675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4872b5022cd1a1dfba781317f07eb4448b0787fcdfb4d56c7e0054c3de1c12af. 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/QT3F22548676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd3cd3119e6f99800c6fb757769a4cfb49d21e5338f6a29396bb564181696df. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QT3F22548677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fbfc11ef10fc4b9782d757e19092817ba5353ef880d99ae350b6f75b5b2ceb6. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:58:20Z), 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/QT3F22548678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52977b2dd2f5b93fd629f6a5b02a55b6dd9c0f8df33669c645f9ea56ea74274b. 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/QT3F82576775.