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 0x406ba377948e19805562a958a7992620e32f61dc9202c9bcbc73ce607ba3513f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/85073d4d-ec15-4602-93db-22be0b751b81.json and https://artists.proofprofile.net/proofs/artist/85073d4d-ec15-4602-93db-22be0b751b81.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 0x3ac3aab0b0b178720378d93f95457c5f35bcbd16335a9f83c77d655537621181. Chain 2 (Bitcoin): anchored in block 957544 (2026-07-11T09:08:48Z), 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/QZHN72197123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc000285252fd25f6bc838534643ca8d1a864d761f6fdb302d4b68b8803d44d4b. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZNWW2140920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494c236e285cab2a17f523f3298a12e78d3fc387f1b7580b40d78dc0903cb574. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZES62233524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141b74d67327cfa38c73d86e9fb42327ae2f3687871407b4d19d4b4ec9093d23. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZMEP2298043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6738138e9236293a2c0f56139580ac92062b3f38e91d3ec0ab62dc1df869da22. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZES52322937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a34add8890b97917cdb41f845fff5d71b629c9492c78331c1be7aeef5e46a8. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZNWS2472070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a34add8890b97917cdb41f845fff5d71b629c9492c78331c1be7aeef5e46a8. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:54:08Z), 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/QZNWS2472070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e45c75d39f6643529735be605019c7e93375ffe2e4e63a3d36ea557e076d3e. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QMBZ92453833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4516e898534e6fcdcfa1d041e8abda778d9ad1d16fa0b4455a6fc0b1f73441. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:59:59Z), 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/QZVEM2357016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49823fed027319469aca6d227dd78d016a158977d27c2ae0670ae525ab4ba83. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:23:49Z), 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/QMDA62592355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f68b4a3331427c819acb2555452998ef3e82115b445f2843fb6949f37bf4783. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6K2259083.