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 0xa612524d89ec8851de69cd45e322617afe908e401252a35981955b5c85c301c3. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/556f02a2-013c-46d6-9d49-01a73a75a816.json and https://artists.proofprofile.net/proofs/artist/556f02a2-013c-46d6-9d49-01a73a75a816.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 0x2f19f714f8578585ed093362b005eb7e7438f011c4e95477e8fbe97e70238ed7. 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/CAB392002872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4efa885164a7c3bda71d15b3e8ce43d16044f4e6825887ac920033e517c1c7a. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/CAB392103151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38c011fb787bc6d9491d18d6f4c41374a0d4eb7aa86feb7f6dd03cc5e80b9b5. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/CAB392404205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83024fb30789b86c209f18f546fa8644e756a4f979a1b5a9ea253b1f0c254ad3. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CAB392404208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3323a685186555e522102e5a49f6bdfaf29561e25874fcc8d271ff7703267747. 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/CAB392404138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382308dbf38dcbac6fd9ad909e703f0020d4ac0035f1f04173895c18f53c4dfd. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CAB392404200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568712e309374ce258ce890fc8227116a5aa77d555b5af33d428c229b064a04f. 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/CAB392404201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d6b17e3114b6429dfaa5115d4209d2747213e526328864eb938c2c8e7be68a. 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/CAB392404202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4372e648565852176ac2daac328da192b163f572276ed3ce08a673e3609903. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/CAB392404203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04545672267918b7e89be5bf8567f991982e34cf2138aa4a048d856418399f94. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CAB392404204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb888986099dbf0d9616aee78d04a4eebfb5d2f0e52171fe4d330bf3e1b825a9. 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/CAB392404209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38c011fb787bc6d9491d18d6f4c41374a0d4eb7aa86feb7f6dd03cc5e80b9b5. 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/CAB392404205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4dee0132fd1b74a9ca75a37ca602d1def5fb268a10f57ff7f120bf570059c0. 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/CAB392404206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f83eb83fd8248fa4ceef845558d12c32b228a653e0dbb602fe57be614419bb. 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/CAB392404207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83024fb30789b86c209f18f546fa8644e756a4f979a1b5a9ea253b1f0c254ad3. 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/CAB392404208.