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 0xba76ee8fe64db2c0601b9ce6275d9200f143a9a76322233d9f8289989785a7c4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/00bc4fd8-93b8-485e-adcb-7cec51f655ba.json and https://artists.proofprofile.net/proofs/artist/00bc4fd8-93b8-485e-adcb-7cec51f655ba.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 0xdbe2cacd614dce680b4cf434f0fc46a6d68600bf4c66d539b0b3eb48792ef81f. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QMR481900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1472dbcda71dafdd8a2554b06bf70ed35163ed84f47de56ad45cce9a55e33fbd. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QMR481900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b1fb89db25be6e85f141b7e0350eeb67301d4e1720e609aa4acc16a0af4c03. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QMR481900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f9b5077f4afbbc2d3fe20f62d7d4b77afbbb39da3bc5bb8c45047e2ea2174e. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QMR481900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1aaf9b75759efdd43b57a239cfe180b1543891805c23641cbf9bfa6d04de43. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QMR481900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0782e1e956500e76ceb675d9b8ac437e1b5f5f977f5dfad5cf540d028a92089e. 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/QMR481900016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f15436bfa78f47f837098787cf7b87bea8039acf9106440c074b2d95cb15993. 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/QZMHN2015386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef68dff98563f153dea5b1f2bcc5e4605489b7bb93905a6f3f0521171db01fb. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZMHM2054417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175e3214d72320dc15bd2b6bea9f6b6cece50b32129c9c7b25559dd059e12706. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZMHP2041199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2514cc4580bb7232bed9367b7460a2af507e5f770db80fd98ca45fe3be443be. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QM24S2300502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9397f0e60f0abf2748e4e4f67102c74777ac150da1f561040903b7face53108c. 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/QM24S2302186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae87184e8d3f1b573441a58e2eddba213d12a40cd7b9f5fc5ebe8e665304e7a8. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QM24S2303451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f3f5ac52fc9149dd369b0fca7c5dc96df87fa79ad94a69a370e8280a9a52454. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZY7Y2300245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5c89f0c12918582912578a98c739416502f61fadd94a7ab9d955538db69220. 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/QZY7Y2300314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35b7cb977168d87b6c05c6bea35ab60c006b85a6712c665d2dfc34ff84da4f8. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/QMR482400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2083629dd8d8e4b6bdc7915df512f10192ce0ee379bf501c4d98819e1ef85ba9. 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/QZQAY2583707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d7e0f6f7940012c905cdd47f464b6108d528e627113ba2232f4a42bcd70394. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZQAY2524526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa071ac22b656033924c58a6cef4eaca112d57afc41a627551f6802268c6b2b32. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:23:32Z), 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/QZQAY2545456.