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 0xca3fe068ddae5aff5e76f59a1eec23ea58e1c150088b9e2e69c4658faf8b75b8. 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/0872c2d2-ee53-4c33-ac6e-5a18e1727abd.json and https://artists.proofprofile.net/proofs/artist/0872c2d2-ee53-4c33-ac6e-5a18e1727abd.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 0x94e4e3141b75392bcaf88ef96789c65ee7209457184cb6b8db556d736557763a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/CZJ701300161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c54b2e106b1ef436c41958f843aaad0c74c8d424ce58d3d49d3842e49e61b4. 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/CZJ701300162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc82052b437b9443643957cdf79ea1e429fc4a615727cc5544ac0d8e68c0d51. 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/CZJ701300171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605fd67255299e0b91700d7bb99a9e5d9eacd94f566cbc9626b5932aeec0ee77. 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/CZJ701300150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4f79bdfac5f79445630dfcfc0fddc71492f7827f0bb08b69cab059b7353150. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/CZJ701300151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f5da96092b903d4fb621ca1321197fd1bfcf2c5b3ff919459e0c246372a623. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/CZJ701300155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b156cec22efe0905bf4729fe7f380a6bdbd3ea63c3aaf66b0b619cf856bca5c. 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/CZJ701300157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8a738358b17183510378a8343693c383e87e899995d6d0eed91dea83717893. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/CZJ701300158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659e801af4ba4d42177f84ce9d683bfb877a921685077035e8b864e86743ad26. 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/CZJ701300141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde6ba3f398f8777f358c81981b570e89a382814bbdf90c5f3a3106d615366bf. 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/CZJ701300145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4a98df1f0f2ad9fe5df6462c60d23fa1d1a963858a537abf7c5106fcd0f30a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CZJ701300146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11364aa80ade02862ed4682025a5cde0c2e303ac60b86afd7f6aaaf966510444. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CZJ701300147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08d5f51ebc871f03d300951bd560bd3872c49d5060ac5148f8ea4bd48653abd. 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/QZ9JZ1758654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97bde4357784205d96f1f4cbe6e0b11fa3fea6ddf95b562668d95763638bc6a. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/QZHN91947346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0dced43b5a57dce65ba1fae9e0660ea9011e6417e0cc8f1abcbef0bcdf64077. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZHN91947349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a7a73f6083fa832f35e4092ed6504da7406a7eefd5536d93a3297d0d030007. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZHN91947351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97bde4357784205d96f1f4cbe6e0b11fa3fea6ddf95b562668d95763638bc6a. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZHN91947346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a7a73f6083fa832f35e4092ed6504da7406a7eefd5536d93a3297d0d030007. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHN91947351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d93751723b37271bd1b3fc82eb05643a369b625867ba260a569df92a5b9bd4. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/CZAZ12000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e40ffcdb5126a8b12c907e53589a6e73f0e4d1b6be27c4dff5d0ac989a59d3. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/CZAZ12400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06cbd340f8073bc215ba491786f47092f9ffd97396b101f9f40dd2960d843bb5. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/CZA232501496.