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 0xba9bb152d61ae4e062cfa0435dabf1006602537aba62ba6cb78abc43afb257c9. 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/da187e67-0d89-4361-8ebd-f8a7ddd29de1.json and https://artists.proofprofile.net/proofs/artist/da187e67-0d89-4361-8ebd-f8a7ddd29de1.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 0x4ab4b95d215a8558245e788cddeb4d55925de4ec6af8a09112b856c42732bdd2. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T05:04:11Z), 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/QZZ7W2418022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21c40132e3866ef9fdf5f32e9ac0298d6b7cb02e5cabc1377c4df544f17a372. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:37:51Z), 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/QT3F32435332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8853c1649980c734764874ad13a0d971df2477a09fcf5fc0d8fcfa0dc793d530. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QT3F32435334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21032db72f3f90bed79cf32f0c66605bf78c886e4414106f5cd8651a82a936d5. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:01:49Z), 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/QT3F32435335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d71eb7374cb4c9ea9c790d72d175c3783da179f86a6972ed5687465f9b4855. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZFYZ2527287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8ddccc0b22be90d4fdcc221b2c3c5a40f52b2ba8e103da18da81b659d9ba49. 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/QZFYZ2527288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c510365209b76bdad6e5198fc7456821e10c601d67f52d60bec7a7b7cb59a45. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZFYZ2527289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23739e5b5b1a27726abf4acc608726b2c064174d48d2f2afe9e22216f865be2c. 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/QZFZ32599091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e52c1df017ec53b65061a532c148cd0e2962145c1425a4952e2e4e8f684c3a. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:23:53Z), 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/QZFZ32599092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de393c249f6d93cd554f3ceef3314a8e073018f9e294a565b3240e2a1592ff3. 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/QZFZ62502125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2191439b22734ea42a81bca01fc21da1f21fc530c8d37334de2b2e7afbf86cec. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:37:19Z), 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/QZFZ62504691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeede49dbedf515b55784d332b726f4942a0ead8146ce5b8126839b5c298ac08f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZFZ72524754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb12f67d9596c83ae5e33d27bfb67c83591c45398af77207d975ab7541baa150. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZFZ72546099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04838c7ef01372cc412b7d527a68f9f3b154e76d921fe8fb734ea1962869d112. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZDA42514098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50600ac3eceeaf3a58a1f41c81d02537f547fb0f88e49e591ddacaec125014f9. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:22:00Z), 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/QZDA42514115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739f533aa398a7d9a47a420d9c107402664afc81922702ad42f662c0ac0b6c9b. 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/QZDA42596963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e7ddc7d53162a04d2cfe4c344bec5a467960caaa88d1b57dc0c280d813395f. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZDA72544763.