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 0x4cb99883323069117cdc6595c4a525b90b70bc3ac76902d50e21c785859cf5cb. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7d87339-e72c-4253-9353-392d5d697804.json and https://artists.proofprofile.net/proofs/artist/a7d87339-e72c-4253-9353-392d5d697804.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 0xc650064582f2533d89c8bb98fc316814e5d79dba14c1e16a5c0ff0ce39b1462a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/IL7532413693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d82820b2e8d9482a521d96fa0798baf53dea6332c64f5ea2b86b0d74e459144. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/IL7532413694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399871ef154d7b55a7140145f7d9e106c54af44489ede8ddb0e1ae64ca52d21f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/IL7532413695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe027d402b403cacbc3cd2f6a11ea5f774f0e213fbca3203f8029087b7aac4fc7. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/IL7532413482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c16309861d5d7090d35db22ad78dd69b64fedd5ae1339a8e5a36a9819262b42. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/IL7532413696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ee1410496daee672d7cdc3363d53c21f30da76c2323250c18b0fe77d010345. 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/IL7532413374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6afbc4db523eb3b6343280eacc0054d4da7c7094493dbd8253b75876992bfc. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/IL7532413698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518e888f0a0ab8da63304600f3ea9aebd750ae05ae68043a1228f5530d6dea58. 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/IL6192203700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264b6820b266dd71eaa6cba4e313a5b6d344c56e97b62cc07b29e983092c767f. 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/IL6192203701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bdd21ca347d0e5f3cfaba93022d168c3e861e11d6c8f2dbb13d3cb0be1fcbeb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/IL6192203708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba51c610e2468ead9ab650af1edc6165d3680d4ce70032a642f0fb9aa0398a15. 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/IL6192203704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2cc9219a5eb3f5210d9818a119c68db29d281e9a308cc1b24e0a8a1b85a7dd. 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/IL6192203703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20906479b8728f152407259b17ac5cb2800f76ab0da52a81a239bf6ff7d34773. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/IL6192203702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc764303cb8198d3a2a13bea2df9ba46967ef5f9a1b7d56e2b97fabf211203c. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/IL6192203706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369a3ff9384dbbe5fe5d8176492184d043cdfac5afb753d34d2278b42074d6ee. 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/IL6191801055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591830076f116d2d763daa323ab724e649dbcf6227d95f1b744d6e6f28994815. 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/IL6191801060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89102752506dad739677b227056a6eb3272f2b6f4598b58fd78c5d3f3fe0b6c5. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/IL6191801054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac46e201b7e2bfc01e2513fda09a47c00fe46be79bb911e70582e7b1af407ce. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/IL6191801056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3686a976d91b296144779100ccd0f706b44a4f42b5290ea00c814e151b1b03. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/IL6191801057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502cf60306ed296f279b32484a77bc52a4578032586b777e14dc6adfe40e47dc. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/IL6191801059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb10056bda728e9982500d91f053f59983c5a54ef5aea7fdec09f3ddd23f3f2. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/IL6191801061.