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 0x0e559e46cfd55a13f777e6ce10fadadb189c00a1a312c65072535fadbffc2b5e. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2033e143-0025-46ac-b55a-43016a20159c.json and https://artists.proofprofile.net/proofs/artist/2033e143-0025-46ac-b55a-43016a20159c.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 0xfe4afcbbb2eee0b5b5f755c571e4afbab556b54dbc48bdc79e4ab644ca3a09ad. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZDA62210146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4424294dfd3f47a0b62f6584cced82e640a0f34004278a43e41568dc5f6d10e. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:55:22Z), 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/QM24S2305268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b40e6a65d26888ebedaab48a63668df1d43ac8eba85e4d9eea2302a4ffb5e1d. 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/QM24S2304084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71297ba9774b54e482a3949916adfd5e418bda1892f6761ae34ef0ec4a64b7b. 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/QM24S2305478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc42b84aa965e65d0a9e5438862d1eee952ec646a486d2e559510b061d6e4c6a. 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/QM24S2305477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e82a828a818d1d3efc80854464c920aa0453044e25a87494979cbee6a34786. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QM24S2305476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a85b0ccf053df578445f76356ccafb0fb1c81b450dacbf58fe2b16974b8326. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZMEN2452781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb07352ac0dd66fa8bddaf7f8d42a3f39e86784167d47d3e819dd6f7887e74c1. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTB82451956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260f2bc7abd2a6ba3cd9188b8a9534bc5ece05eb77f9f6002175d38109c41c92. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:44:18Z), 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/QZK6P2422749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a85b0ccf053df578445f76356ccafb0fb1c81b450dacbf58fe2b16974b8326. 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/QZMEN2452781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb07352ac0dd66fa8bddaf7f8d42a3f39e86784167d47d3e819dd6f7887e74c1. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTB82451956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1f13b968f6c692f6efc0d8bbf719d1003a88729841a772676788f757b18ffd. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNWX2477329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba96e8b4ea05ea2a761ffc590f6cd09b0220003841d6c926009c4f491d623a0. 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/QZHN92543232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c06f9cc9a54ef644e8c914708f185276c894410feab5308da43c7f83367d9f. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTB32525718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4bbbed09be991aa24bfb85557ebf6c78f1def81271c0a13272476e0d52848f. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZNWT2587068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba96e8b4ea05ea2a761ffc590f6cd09b0220003841d6c926009c4f491d623a0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHN92543232.