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 0xedc6e4e30e91867e85d1d37ad5909c77472ff6dd3463bbc304aa4c86737bb672. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/14248174-174d-41b2-99e1-b02aa00ecc2f.json and https://artists.proofprofile.net/proofs/artist/14248174-174d-41b2-99e1-b02aa00ecc2f.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 0xe3cab31a4146bf8e4a090eafc2b93c8f53ba787c5560b55c84ba6da390958639. 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/TCAIJ2402202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce3817474443a8b72d5561a6a598fa13953b694330accac6f561971b6f186a3. 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/TCAFQ2173240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ceb0b30bba6d90030d5a5437953fd3bcbacbe0df40b840e63dc382d60654fe. 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/TCAFQ2173254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa700d7de7f17c4aa8e26b70bbf53c9e4693febdf93e452b948839ba74c43db1. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TCAFQ2173588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961acdbdf2f7b110457d8a66aa0c90d41632231648e7b66c8bd0de6b4db72d7e. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/TCAFQ2173258.
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 0xb539ad43c81f08d86c589e460aa623c366b4a5ed512aaf9f256832c42c9fa469. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCAFQ2173269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04fd72e677a62f1cc07032dc77c6db56a4c29f6b4c5d285ff6e84f8b674a6e93. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/TCAFQ2173614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f0c48dbf5a95394b0e44eda74296f5bd4d50038cf0072c7ff74b8fd7a160cb. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/TCAFQ2173622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57b6d24b3d178e7d52f1eedcb9c6913120fbf1c9ae2c2e29368a6828003f267. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/TCAFQ2173631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7203c1bf6b9d8d15f80606726544ed2a3aee964f80221c68dc143a9e3abc94f. 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/TCAEX2070269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd621922f785e097e22ef1a488f07ddf7d34d720b2f17158f50d6c66d21ecc117. 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/TCAEX2070276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26519d0e55f29b47818fbcb8f49d15d7c6a24b0d6cac3c86c47d797a7e90d931. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/TCAEX2070236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30457a5d3ad7ce5a344ac1f97516c628c3141878c3ea37753a39b69bd15c1cd9. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/TCAEX2070241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb8bf1316f5f1844a1581ab870877e41c462e81f7fcabf2c647302122711964. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/TCAEX2070256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927065a0666d2df679c132ea28180f9cb7652e28948336828aee161a03b2dd29. 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/TCAIR2444723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b2bb56c66d46637378dd093807b47cd8486c67bb5da4af7ac59dfa94bf34ce. 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/TCAIO2426415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0193dc7f88fa5da5f504e9f16a6a773ef513500080abb83125bcfa1e354316d4. 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/TCAIA2485129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d01fd9e8dac9d60d2491bca7f39c2a23974c3a84356292a6d6020db717eb137. 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/TCAIA2476530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e62200ef44d5f91c4c070336c8eb006aa6d5d3a13cb041ec2a5f7745bcee9a. 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/TCAGG2236903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df510b5e98fc02984ee392f41334dbb3be7d4f7cf894582b9fa018a98372062. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/TCAFY2100061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ceae23b415916a378375d14b4d7c4308355bcdcd6c9a0670bb012cd363c6efc. 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/TCAFY2100065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d25e0459a29b39298b2b67d879995df66ea3e7ba1192da463225f593b3d371a. Chain 2 (Bitcoin): anchored in block 960305 (2026-07-30T20:14:59Z), 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/TCAFY2100062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5424b9680443a0f68b565242151034d2cba640fe5acf81089f2963bab151b30a. 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/TCAFO2151375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed72790d27d66fbbc6555ac02724c6389cad95e06655e3b01e27354a034fda09. 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/TCAFH2039694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee41eb27d543d7d5f059fb0eb5fb123218c491616d5ae8c7b67bc75276050ab. 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/TCAEN1921042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f45380283759ad867e4718aebaf29785713572aa904a64411ebb2251ff01a81. 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/TCAER2068382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a0be81fe4ba35f05f88c896da6d8caf21b7cb5c5b702b24b9990f0ab2e692b. 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/TCAEQ2027242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e0b9a66451234267c89868ff240d09d2265d2ae5cf57926d05d54729dbbf47. 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/TCAJY2541369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fcf5af8d196ba5ac99509c49076e55e91490ead3fa3083ce197d0d1759b7b0. 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/TCAJI2520701.