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 0x5dff7ffb0c4403f57d491718c65ba27e18c2e81b867c2b910e2ef6b55436e073. 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/224e5a57-df88-40ec-b294-84a07ac7d634.json and https://artists.proofprofile.net/proofs/artist/224e5a57-df88-40ec-b294-84a07ac7d634.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 0x92e062253e91ab64ffb9614112dfa3e6babfc565eed59c11eb2d464dc6230a3f. 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/QZES72582747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d977aa785c63577006552b5a0beca68569c9bc147eeeff94aef2fcb45cf83ba. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZES72582749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28986b2c4986664da0526c5fee9dd52237c89d0ad585b4f516dc238510e1ed2d. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZES72582748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb18a8f335f080334bccc4e90e2f1cc058543c6e1ec37532b110a88393d8720. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHN42502718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f1196e214488d2855b0b4cc1e434da47c437a11770fa4ec4b008df8da7b49e. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZHN42502716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c83dc746731e06552a00291aa2b4d69fcdcd13d3c7e26e8e2b8cfa62522bab. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZES72582745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf530cd55ac6b6bfcde4d6a0b3f80ec2d6298d3ea41b5ea5b354285744d393898. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:24:49Z), 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/QZES72582752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a4695c303930fc7896696582eccd6c5c4a70879498e5eaca6b52a403cf836e. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QZES82537667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9528c1d05257a6702609b2e176f47eac312c31813c0c4cbd9fc042ac1aaac4. 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/QZES72582736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce29c1b39fa9764273849e109be5676c36e9cdcf28838914b1fe298c799a1b4. 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/QZES72582746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e17254c002ec8099de532418e48cf341b89ed15673a3be6752d5fa7dfe845b2. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:42:41Z), 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/QZHN42581445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6263979f74dd0ab1df67e7824b28cb81b91c947a82b92f2eb8d58636fb7a1588. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:29:26Z), 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/QZES72582737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0f9f9fd9da542ad95649b9244d38e810f6443e1beeeaa409198e4774f744b9. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZHN72579573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c7575ecd8d52129e158d10387a9c1d535bbc0f89286325adebe307a50a1990. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZHNA2500430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6fa3be9572d38af3543aaca0f45bd83553e37fad154e9a314de3565fea5a232. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZHNA2500383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8f7f1263aa962859d46eb3eae704d9dcb7cc1b3d8a586b33cd37dbd529ae8e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHN62563986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29312e6d263d0fd4000cb26d2a9623ee04c36da95dc3574ee4bc7a782dc9a9d. 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/QZES72582738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8148f381a7ee022e5f2ec6ea4a545f702a68f10c244cb60a0474eabcee403c36. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZHN42502854.