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 0x5638e10d9464dad1304336bd9d82bfb5fdb0c48324dcb9606d48125a18f940cf. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/647a2885-7f14-48d4-9bbb-0ff5ca0116d2.json and https://artists.proofprofile.net/proofs/artist/647a2885-7f14-48d4-9bbb-0ff5ca0116d2.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 0x98f4f45e11ca4e42d641842a74deabf88bb2b62c715976eb6959acc8efdf9c32. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTAZ2468725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de77f42cf066107ba4ed5f9ef3098d0fb92c600f8324231b1a2ae5ba203a03f. 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/QZZ7X2460411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51fb2af218c56c917ba07ffae8acdf45fc97c4e61444049ca31e343ec9fb081. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:42:53Z), 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/QZHN62594037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68aae75d473ee74e3deb8d83ab0634a6221f7e0cffa6bcaaa06152ab6d993e5b. 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/QZHNA2500528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1408c010fe296aec145218bbc6b68b3a484d96883b2cabe5aa3af7067c395e5. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZHNC2575903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33de3c8d96e40fb815479b4780e25363f91b9733301241b2529732eb1d1b2dd7. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZTAU2593312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd6a74d4f742cd6ee228181f201b583da9d1b9470f4aeebbaf3ecc4347e12e7. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:01:05Z), 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/QZTB22510146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0643dd40b2f6b74c4934b5d795dfb6e36702c7496acfb3eb542e7ecad9db0a6. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTB72541460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680d180480aa5ad839d53c10f2ce15c1170cc24950545b4a1d4536d46bbf9e24. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T23:00:55Z), 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/QZWFG2501048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61ebf3ad97f46e5c5efae8b53d9222117a5dcefe4198952742af25a8068e026. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZWFJ2516575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962246ff1e4ba9c57059f2b499889d52363ef432e4711ab9a31462376828644a. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZWFU2564529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acbfbd764e547b240960852b8a01486f994caea160548f496608782dbce8dca. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZZ762512304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d5840e9afba6471a5f6465a141cc4836542695c6d27741a6ecb9a53aa368bd. 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/QZZ7N2533759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4601bb3559964b63fc5eeb7022bf7e98c64cd699ac984e555de907510e31f7d0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZZ7V2541229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4443d2bb895443179349c168d034235ba7cbf91c0b8dacc15ff841b697be1a4. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3F32587796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f79a3914e45a1f865663da3e6a37b69b89caf722eeb040a7475299eb701eda4. 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/QT6EB2516791.