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 0x339878528ac08410c7f89267427c2640a95864a47fce82c71ecbfdc1ca965478. 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/0170f2be-6ca4-47ae-92da-da398c9209e4.json and https://artists.proofprofile.net/proofs/artist/0170f2be-6ca4-47ae-92da-da398c9209e4.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 0xf2e64be18c877941d7645fbbdf431a56988398b125536528ae094a11bf94e5bf. 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/QZS642333334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949c23c3847d560e382f7d56f2daae4f3a7d38b9e9959ab00c6cc34f0f57ffd8. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QZS652315535.
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 0x8bbb5d7bd94a86eeca174d52f98ff82201789013cfcccb5cdf024064e29b756f. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZMHP2399030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3713ba2458e80da4bb625c3001fa834e72f7ae9d5c566ee712a9cf3fde2d3bc2. 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/BCHY22300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4f5870af92a65c93db35338d4fe0c4db312d370f3e71faf0a0a378549f4285. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/NLCK42221563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023f799300388c992d24278a4751085bf6df1f149dac32fcfede4b6df829dc86. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLCK42221564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b930d81172b026d235d4360eedea4a1c249147e223845e1581763155b177520. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLCK42221565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c511597a79337f998c59e20004f8d289e79259f457fa2b107118e6fe8ca878. 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/NLCK42221566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959354a422936ddd83a0b1aa506e2b955680ae8c706f3b37f611a1d1595abd23. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM42K1978507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0901bca2f1e87652a54eb09f5976e370289f5036acdb6e927c877a2bbcd096. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM42K1952094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9383e845e38ae6c4971eea9dd68008c5cf72e43829ef4b1bace4d55f6aa7c9d8. 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/QZ5AB2063311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa96ec36454b2798f7d17fd449dd33d60ad388229ba7ad599707b4a11acdd616. 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/BXIP01600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb08f6dc77348014d795f06e1983b8cc06fe4870820ef84aa0330d1cad21cb1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM42K1730913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10bd4e6435a4ce6768276fadac2740405c312fd34d88895bae7f50206acb551a. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QM42K1747316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb613a902b8af9c4f282d557346e9fdada72913ccc5630712e0e6fc9a130e8176. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/QM42K1751180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb477eb25741a565420db70179ebc309544b16ab60aa6ed6da136815d52c66257. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QM42K1721138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9320fb26310b4803b558a70b3104f8c2d78691363c89fc66d505cb8d85e026c6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZ5AB1625006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ef18af391bc47c28ac64c49c3c6e357ba2a375dee3e89af3eb4cf2c52c2c93. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZ5AB1625008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2c1804f3b111f1f5f15860f44b1bc4eeedd6915c06d7df0ef7828d1cf4c906. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZ5AB1625007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4c0b5f4e4451e59f4f6c4622ef0e113a8e905c279fa2b7ce60ab69fe934711. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZ5AB1625009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0b40d9299e29e18bf39ff6b367084b7b98a39ed015c226a8ab508587a44b3d. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZ5AB1625011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907b86732b08b0042bc208c7ae80bbc15a5b6f6ce7f7142fd72552d2bf863840. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BCBTB2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f40c9e242b4522b2fd2c993104a2ae5afdec0a60102547d257fd53adee905d6. 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/BR8DZ1900018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d4392509ba3ade4b1f1699aade73cd37ce6fcf746948518c2c84e26effac79. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/BCBTB2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6628ba13d7f934e39e66be06b57514bc11b165012584aa6ccdda4614c1646f1f. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/BXCKG2400012.