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 0x30ffb1a59d7eb4ab34d77b8eef0dae10c4f6cbcd1c7217d4d7f05fafe6bf507d. 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/47b0056f-6c80-426a-bb9d-f351c0aa9206.json and https://artists.proofprofile.net/proofs/artist/47b0056f-6c80-426a-bb9d-f351c0aa9206.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 0x70796a5649162c5cd3c6d76c7e0327cf70f8ec125ba0f31e705e0bcd78b90596. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/USXQS2232153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae67c4cd79a25315fffa7f011404c0eaa3a9d7942ef677650d4021af4f21970. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/USXQS2435678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4571fc80f9e87abb1f86a585bd0d85f713d88a4c0f7fee47a2a27da536ec0931. 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/USXQS2541493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56541562edf1ec0168ac6ab0589f9a3dda601d72273066af9bd6d1c2a6679a7b. 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/USXQS2541489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83faf64ab1e2a7cdfcc41ae2c6fb17fc662bee9f675e1bdbefcfe5c0d75f32ec. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:42:51Z), 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/USXQS2541491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4571fc80f9e87abb1f86a585bd0d85f713d88a4c0f7fee47a2a27da536ec0931. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USXQS2541493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3502fcb51b26268c3e5e59a9cc45dda43775a8b4eb75cf42099e31b5d74494. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/USXQS2541494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa947b545965651e380da435b78134623912be6d3fa2e6a3adb07b1ae33aa6ff0. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:07:32Z), 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/USXQS2541497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f882801b494802c2e5886874bcee19a54e1c88b912e737fad8f16e9da49eca. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:44:35Z), 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/USXQS2541500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497b84bb65f84022b641567338b9ef14ace336b4f91754f58deffba011abf59e. 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/USXQS2542312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1485edc5543d5becd44c4582eb38ade1d8a02b02a06f96a53db3b9f2d74e44. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USXQS2542300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ebe89dd8f5b1615941b5bbc8419385e339b797e1cd7321349f8ddc63010f3f. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/USXQS2542302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce07dca68de33d92daf6db24afef4e90f08deb867bf2e628a877fbbe931af3b. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:28:55Z), 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/USXQS2542303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a3e3911861a86cd68fe4330880abfeb7342583635d61cda34320b52b74343a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USXQS2542309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5c7875cf4bd4744eed93d24877843d26aa20b1cc928e20bb3a96f9d1f1c779. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:17:14Z), 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/USXQS2543998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa20179b002dcec9b336f0bed2f5651fd729021c9b0c8b251efe453d53773965. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USXQS2543999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ab249fe472760a30415cfcc13af705a4536546554a034a9431bf874f2acf72. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/USXQS2544000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39fe24a88106d28ef0aceda37b67a1ed73e1ac769b6acd3feac88ab7252b978. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USXQS2229333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee55d885e02c138f7e554ea5f61d0db98eb1d425cb1f7408b7510ec39270a63b. 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/USXQS2434955.