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 0x87b27fbab2496d568d09c85d5a044e70692db4958423814c3a1f9bee09af7dc0. 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/ff464b61-4702-4d3f-a282-161f984c96b4.json and https://artists.proofprofile.net/proofs/artist/ff464b61-4702-4d3f-a282-161f984c96b4.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 0x2e21fe23eba3040a2f31b884aac1d948027b829a4b414e2cb56bef174b76b52c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZES61866752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b84203b435967cd3a9bf03a1d53575e277538ae9b382083ed98270378337cb1. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:05:31Z), 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/QZES81833415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7588cd1918dd219db4ce3067bc75303625f666d0a05f7d7e9dc1e6c4b1a758b2. 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/QZES61994276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f1d7d0001dbe28f97bbb6803ed0fc05859117fb050e8ff01d3cefaca6ab21f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6F2176335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcdd114c54856d153d84feaa144fd138bc6e0fca831012ab36188628f32fe42f. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZMEM2232123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b825328cdcb49c042ac56cf072aa74c6cb9a77dad797054f7a936c22655fd6e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTAT2218554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae27b08bd36066e24299e12722f318f939e0b7eb40ab78f3145947ab39d5863c. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:42:26Z), 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/QZDA62342494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6154e523ee1e2e0b39f8b4885ae6d161d4cc8d2a98ba65cbfddd1b0937680a. 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/GBKQU2392194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1feb17a197fc348fc7152d36d145615dfb340c6fadecf5ae220e1a731717c538. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZFYX2421925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab4d89d4672c18fba5054e589df3eccc9259deae44ca25a6ed7bf447fd8bbbe2. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:07:16Z), 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/QZDA52463966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c6bfa7ba4b20c10dbe62bbe051832ffd6164474c4d9eae94e8205ddcfc1bfe. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZTB22441750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93cc4310c85366df661410a3bc53b7f0705a3c46fe69f99a314ee7e9c8661eef. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZNWX2596197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfada15231638e662c63bc91ddc1391aa2a97a872e02a000950288e54f9de751a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:44:54Z), 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/TCAJT2537329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc926d8e0bb596c309744a76cf83be13c36c391bc2327a89f364cd0b296e333. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM42K2266567.