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 0x75d61e0fd4838663f7edfe540b03ef278d6edd6ced15c6cba4b3b4c1e3b5e5ba. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d85598b7-6fbf-4493-858b-2fb0d982335b.json and https://artists.proofprofile.net/proofs/artist/d85598b7-6fbf-4493-858b-2fb0d982335b.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 0x9db966eb71ecf0230f4cd3db6766a0f1eaa96e520c1c8c10e82c5ba489c6e51b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:07:55Z), 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/QZS652354997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92839a87d10e5aa98128ed5102b30dd2f4c7b5a50a9091b5e2042a7eab1dc9d1. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:11:29Z), 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/QZMHN2461773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa04a8ae3f6da882942a2e4b1bd4912b5426f9d82049562bc798ccd2090eb77f. 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/QM42K2484489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2568bd088b4e036d2a88d8ffe8ff32fb1c397ffbcda78c853f7c374e0ac4d1c4. 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/QZMHN2468336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1cf3ceedfac6acf600d06de7e97ea420374454ccd9f6c5e8a6e535dd7e517f6. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:29:28Z), 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/QZMHM2467184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10555793e5bfbc58d2fed6a45dbce40ce7c6914fcd13be3a7b7304587d90b0fc. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:03:02Z), 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/QZMHM2556377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74acb3169a39850610fd4ea1782e60eca503f631d439d3612bb219c1181a584. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZMHL2569846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc04091db08954d1548200c3294bcb39aaee5a42b08a8b527f5ba905ac11d1a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMHK2568852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98ec27f67202de1642d86b52b957b517147c874cdd37dd44fa8b3ad7d7d6f19. 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/QM42K2573263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74acb3169a39850610fd4ea1782e60eca503f631d439d3612bb219c1181a584. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZMHL2569846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336b4d89f24acdcc530f3afe45e8298ebd4bdb94361f80a658efae3549f389a5. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTAX2538498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa91c9333dff891d6a8505630f40daade2035ceee53de5367d27bc53ec4b8128. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTAX2538499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1850a1ed74e75a38351f578eaef00e6271d92fecb28a62cc5ae6096beb2d4ba9. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTAX2538500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e06d4cd67537f9c5c164ec718675d27e1063abf3d619440dd7f3485f03faed. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:08:58Z), 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/QZTAX2538501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f3c018d203933ad233a61d788c331368b285b6db98be6a0240335e0da92545. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZWFG2503995.