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 0x7f40eb3e26380af61c7ed1fcde413a08152b62e866c5ef8f6b44fa2f8ec85e46. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c127e632-91db-4bcf-8cf4-d5222eecb9d2.json and https://artists.proofprofile.net/proofs/artist/c127e632-91db-4bcf-8cf4-d5222eecb9d2.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 0x8f35eb20a1ea635602b5f91740e7888c1b95cebd59c5f64dd0bee799903e45c3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ZAC032306301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7cb234bcc856257e4e676de6f8ae3c28152627b6db847a712d7363d37f0f5e8. 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/ZAC032306303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f83500d467ec7c338deb76b17eae468009a0fed673b7ea3004d8890972f3fc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:02:30Z), 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/ZAC032306305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5fb8997bb6ee1575cf3675d2f7418dc4fda4ac953082c4d9741b989b62410e. 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/ZAC032306307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2404f0f2558e98ecfe9e432a82ebdedba36a0ca3ce7f9a94e978bbc3adf088ce. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/ZAC032306309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878ccb0dc4ce0ffa8e1614c9d9730b0b64cf062cb90290f7eccfb56bddb27f1c. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/ZAC032306302.
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 0x4b9d98f556564b18abfe8eb23955c8910d41d8ad335f9ca3286df3ced8903efc. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/ZAC032306304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613536359d6ff1e79d80fc8c2d497bcfde723bef465949dd7128c17f7328cb73. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/ZAC032306306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e53b277b05906b798c5a22b860ce3d4474b09fde3c8efe41707fd74399dd09. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ZAC032306308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d208820755a8a45fdec1a75b3e6c2253dc5dad8eea3484f752ce90d977229e9. 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/ZAC032205297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2837060a0e35bb97eab14b5324593523215b9b6d0aa21edee387f971b816eaf1. 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/ZAC032205301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92854a13b13e72491ed3a02b1da5704512843ab6dce4b9fb6708336ebf64953a. 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/ZAC032205303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503385c505f3eee8838e9700afe984205d916557b277649c27a285d7b33b4576. 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/ZAC032205307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa344a46810a689e731c643609291679f8476263ed461188b6691f28528f100a5. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ZAC032205296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0dea4521907f020c2790ae1a05df61b6b22d66d467a37fe39481f68dc423db. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/ZAC032205298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85042d2da096657c3a149242af033878cf7f8206e5e85800047b8a1724e266c8. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/ZAC032205299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43163dca7b60706d54499f583ac528d6ddc8b793ec91c00bd22eeb6c611fa5d5. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ZAC032205302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ebfef83c39f238fe7e7dc41827115753396c830d405bb3b1d2f59028f82de2. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ZAC032205304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46176f73283f06f36a54abc9c10762078b37e0f051a129df1197bd28cb21230c. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ZAC032205306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4438275763830b2d765fccf78dd2945244ea4ac10fb065258e54257939083f1c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ZAC032209280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfdda02b8387a4a0e6b703b5e0089806c4c0304d4ea0280354e493b36639ae4f. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-21T16:11:06Z), 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/ZAC032209281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0613818c0075e5dbfcdcb64c33abe947d4d7cd2848f0d57420f889b9399d373. 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/ZAC032209283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc5764680699c2298537a358df5cd820c6745a694ddcce51cf63f3acc0b06a1. 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/ZAC032209284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbfc9d7cb2aca039bfd1258291763df67bc25edd6397c15c20dca4d14b6474af. 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/ZAC032209288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b26c0d8e097b8422729f10dc8916e73775f70368c083d3591044f76e0b4810. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/ZAC032209278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190d92eef2ab73fc47273e6cffb10a4a33906d2742690c21e669b77eb223b4c0. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ZAC032209279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23905af7d8583242ea343ce1ea60d5e32ee75f783083ef43b1a35b2d87672e2. 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/ZAC032209282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc04c49875b9df5befd97502a5abf8debfaf0179649e2549e2b7bd7e050759b5. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/ZAC032209285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b7f005d9fc1d6df5ae88e88d5569eda4cfb073ddbc1928e2e7b87b24fcd759. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ZAC032209287.