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 0x44795e1c42897782e464b83dc76fb836770bc6e716c566c4dcbd216927645c6c. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0cafdeda-b8d1-4d1e-b60d-0656b5c3c19a.json and https://artists.proofprofile.net/proofs/artist/0cafdeda-b8d1-4d1e-b60d-0656b5c3c19a.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 0xa188ac45f96c91ace7844faef94b6478ebd499dab48bd258517e7aa642a2accb. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/QZMHL2598998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe774deb3edba7372818feffb23d269dbf7560508c87f2b3e7dfc706023746122. 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/QZMHL2569155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807ce3b59cb3efc9b93d7ae70249cfb9cf0d114ba4ebb9aaeccd124f6e88217a. 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/QZMHL2534063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ee4446422eb033b84ef1362a6c465c45372f92d187b7094130b7999322cf22. 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/QZS632566474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63299b52c16024c8f89168a1ab099956b28964d02862aafe4e66fc1e98f22015. 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/QZS642537733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ded52a24fb717aaf0979dcb293506111507627b3474449b22a09cd4a82e45a. 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/QZS632510193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87022823cb91cd111e79d27546b943f867862418087c6fcf0def67ddaf21f07. 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/QZS642522996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5246fa84e88becd86bf1a4a377f935dbef4602ad3555eaaca94a9b6b9f054009. 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/QM42K2515101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54764d28e3e2aed6e1a2548075889b034339a0c5a4efa5eaffbc628c1c5534c9. 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/QZS642521276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c46d1befb86055ad859edf1fa1d1a7f628bf15a7856d75d707352b80f3f8f06. 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/QZS632556397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70285ad88bbf7ad6cee6072d95cfbd835a3b162b4efd4d9f8b74e0e4ee740d6b. 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/QM42K2538699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87b27f04ab15b86bf33bf3f58d5a1fc18c46121a1dde49d7e06f44cfede7dae. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZMHK2509644.
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 0x1b1ca2ecd3b0385aa7f800543223781a31bec621cf984c741875e01197761498. 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/QZS642328898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66ff02d527324e0c6b207036f51ab534f9c2acfcd34eceb5e84eb73614e47b7. 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/QZS652376872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f9a2e3159a5ed5852f3d736c5a8c258304adf635b2344d11c3cf3f059e3e78. 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/QZS632368930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c0446ba931ac4a429eeb6919a2f3604dca712158d30098f60ba3e76b190765. 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/QZMHP2368492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6abc422e3ea1ce91efc8b5f0f48acfd9a68eae31dec1d0be5004fbadf24ece7. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/QZS632380347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397b33c52d09980b9b976270df0f86e27169485043557d6d8e282548774954bf. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZS632380286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bde7046fe14e40f68b08340f41e7c9c8367dd34e188cb04a878963c2e168db6. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZMHL2331136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ad25d8e5889d2ff4ac95e3a9dd0d8d903e8d5de319cc5801a81130c03caaad. 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/QZS652324183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314e614df539f07197efb909d089c16396c59d36ed44d9ffe4591e6adcf879b1. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZMHN2306113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd939e554c52eb247b2314e75d7667086cbe8f739adb2bded7482f74b16f59f1d. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/QZS652329179.