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 0x4699fad46d3a07f6c17a69e0a7eff3ab7636d05f8b79753e40f526387a12eb5b. 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/7a7912fc-1d15-4fe3-9ee1-dcaeb42a9750.json and https://artists.proofprofile.net/proofs/artist/7a7912fc-1d15-4fe3-9ee1-dcaeb42a9750.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 0xea93f1f5dc669f824912b383df7fffb15aa204403f274b91d63e2de627b9c10d. 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/QZMEM2158928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde06cf0d1e20e25ec262ad32d5f4ee9c42a04cef43ae3e65db818886ab69b61a. 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/QZMEM2158929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde27248dbb10dfbd9cc5a3b336a8aeee5b14a79bfb5d1621a90753a405ccb034. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZMEM2158930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be041b718a1c7e83077fbf5c267c57cb5974ffc54047df538ee87b4fa7ef125. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:01:32Z), 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/QZMEM2158931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51efda10629536c5825e519c81c8c8bd80a1749cdd1c75e37d5bd4df2117f94f. 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/QZMEM2158934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6bb5c8f48f6fbef85990377cfe0ede98d9ffe0a969d853510fc153702c9007e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZMEM2158935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890523be02d93e71f4dfce0d40e1b745914e95d408ce0c619c54ec59d14d0623. 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/QZMEM2158936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f4787f037fa1b79edd0c27b930c376ba5a891cbe2da072ca99737ba9ad54e3. 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/QZMEM2158937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397dd8fac89540ea3789e89f58a97a9c3cb5cf4693462fa01e3c3641decfd20f. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:46:51Z), 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/QZMEM2158940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8caac60b0583d16f9603f9df9212fc5096ca8f1a8218c278d01b2ed8114ec376. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:50:02Z), 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/QZMEM2158941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7edf22ca29fc39fffc1a33705c8d40b929aa0902ea6a9257a0e16e6b4dbd272a. 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/US9CY2200107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d2dcc3f8966159f31f46f6f5c2349e825aae83781d323aa62fde827cd08c1c. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:40:44Z), 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/US9CY2201464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f778b8223ba78111fe2c68df0cd5dd765ec11f1aceb4e81bbb634dfcbe1bc03. 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/US9CY2201465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18462981ead1ecad3706e3014263de5edbb27c046e4ad74943f54a941c247565. 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/US9CY2201467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbccd5576bf2b4cca5b3d52ff54a67906e027afaba8151676ff972a7e1918d0b4. 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/US9CY2201779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc12369e3cb1b5acdec27196a5fb6ca294dfde3ff9777b1a42775d6cd7c459a8. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/US9CY2201950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa57760f1c8244eadc4be438cb94f76b751a01e65625909712ed483eaae6e195. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZFYZ2579877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28afdc58d86ba3ad3bbaf09ecfc921be3c670b2d9b68a8aeebd61d352bea9d78. 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/QZHN42528366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10497d9d974dc49acaa78522d9cb1130884afc9c010f401ba443f03e0547dce. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:49:45Z), 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/QZHNC2512785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe159afa52d3730d96ea0f6767c42a7b05bea5c1ed01c722d57a9dc72d04f7319. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZK6L2599851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7818e9c2001a1b0cf3933f22e52da2c73e294c67ed93a59cb3b8cc3245a0416. 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/US9CY2202312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5fc7143bbcbcef251718fa867a258a9b9ed5d42bf89f209482b8703106bdc33. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/US9CY2202556.