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 0x5ba3bd141a0dfedb7af9340816a5ae59852d108ab56794a86737d02125b37dd9. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a337ccdd-26bc-4c44-a7e4-023924a3d52a.json and https://artists.proofprofile.net/proofs/artist/a337ccdd-26bc-4c44-a7e4-023924a3d52a.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 0x21f9c499a22f252c39c5222170991f0ecea34a3257be06a5b85d671ed730f5cf. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZFYZ2193176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff326a2754931ef8921c7767c54c4ed44bbf7267afc963b1832accb9eaac7e8c. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:03:57Z), 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/QZFYZ2193177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2211ac1ae9ac72f6debd754f767b7a6bb72379e4cdd57313a3cc70cd5903e48. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/QZFYZ2193180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072384f320edf846fe37a01d1d7e9ad9c7147c8da36993b7886434124a07999f. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:19:41Z), 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/QZFYZ2193181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20c83da83f92e33dd2df66be7a5913c9d94320fb3833d740adf27521f3e0d0f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZFYZ2193183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3091f0507ce5a5a6c7e9926cd6b1d5335a6e2c929ca6abb737d2394c914695. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T08:00:22Z), 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/QZFYZ2193184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4620ea64ae1ab782632391f4d1af9d547266286962a47f5ee2ce35dcaf2457. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZFYZ2193185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18d8f70f72461a6dd0d1437fd71792d0a3b327f9adf44f1d71c435852c2463c. 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/QZK6P2102224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61757262f9f96235781c5e8babdfc7139e12917be861c7f9beca65fab766d46e. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T14:59:36Z), 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/QZK6P2102225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497a094f7f0e62af5e5ad8cfe600ccb840f26e06a26c2f0c56eefe1f5a455f18. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZK6P2102226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2fb6b684256036df2ace811362dc93fbee52c54beb6c82bbbe54b01c06ecf86. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZK6P2102227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756da4aa40aa2f3525bd490c4c724ea4d47e3c293d2e162613e396bf7c44542a. 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/QZK6P2102228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7032afcc41eca7f9e9b5eea0a71d8f2929afe402a6ccc41101ef9fed9071190e. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QZK6P2102229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9e494d4638dea57914bad2c61003a2ba98b413ad1674532ea76d1aa17f291e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:33:43Z), 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/QZK6P2102230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64aa4d4f1a2ee261d143e8b327811764c752d3f032344bfa113e655f092baef7. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZK6P2102232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8aa5558a4811a475699470c7b1829f40256181e6a93cc62dc30dec85691387. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZK6P2102233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227e188f43b97a1cfff29f52215b0047cc234a17ae7cd4c359ca8274b955bc4f. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZK6P2102234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f3bc07d1b100ea4eefaf4bbc17bd3565d7335a054a3f63addf7f2e2f325a27. 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/QZK6J2276525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ca0d88d300e780b2d323910c7e140d42b1300dc43a32379601bb6bb3ebf3ce. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:14:23Z), 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/QZK6J2276526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd489d96d10899f8dd8dfebd934d79fd8802336fcfa69f530e9cffb1237451f4. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZK6J2276528.