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 0x9d9726b739a94ccbb0651b85f31f959a6a6b4ebcc67a95bc4493ddd20389068f. Chain 2 (Bitcoin): anchored in block 954615 (2026-06-20T22:44:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c601f3b2-d963-4b43-9ef7-972a9b83151f.json and https://artists.proofprofile.net/proofs/artist/c601f3b2-d963-4b43-9ef7-972a9b83151f.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 0xa93e548a46205b8cac108a9745fdd6b8376fff17986a1804071420c0eb3bee19. 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/QZNWY2524544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613e5b26944291f397f5efe4e9197ccb1f7dcf1aa00e0269e47275acd92ef35b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZRP52535994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb995c2d2761c3f4e498b361ba4ab5d90477a6089e9dfba20ae8800821d526500. 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/QZTAW2580733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf72ae45063242cc9020b02ff03852b90d176df75ec36e691413a13b8025b21. 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/QZTB42533333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bbb737b6d6eeebcac0e41f0c975974588b10416b2a576abff349ea4af6c05e2. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZTBD2502462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708a06a7f38fa5f66d71108b0512e44c51f663c0353b5bba3adca7e893078b7c. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTBD2590699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e31fba9906cb6eedd8db8e5ff92c6ce247a20cee5a04304dd7443cdb188c0d9. 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/QZWFF2588962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbbfac6b87eb5ba0fc402f10e8b2c8bd810d7bedb70476813740999fcdcc006. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZWFK2556532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6200ddbabacd27e1ff9cccf75ff71605199d37831bf9693b7a298384c19e6c1. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZWFS2545898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239dcd6a63599e2170c324c5e622293bd9d8ffa21c49717ddadc39265e71d28e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:13:59Z), 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/QZWFV2510130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4d841baa8c30ae2ba271a087d4edc857355222e7e9d1601baac0481352036d. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:38:41Z), 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/QZWFW2504158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14256b99d4097e4ed61ec47a2c608e21c6af01f341b4f18a2a77cd5cf7dfc27. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZZ7P2570988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362318251ab6c0da6720eeda2336ff57d9002ff5ffda4b014e7141485dc86a5e. 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/QZZ7T2524927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da7f99aaff55e596d167c0ba6f709f308c22dafa3a636fe77a3838f29934d25. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZZ7W2534131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3653cf2c7f53e9e40b21bbc739b986a16a01ca81d3d2b7805a52b9434a3ff74a. 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/QT3F22560135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4828aa0bf498646595696505e9a5a5a9afbdebdb51fc2e2fc298b4ffc1f31e20. 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/QT3F72514393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10f58bbb8082a5332838fb6f5d6186f326bdbae7d4b438272ebc5a29911659e. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3FE2557072.