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 0xdb83e6ffcc52d4a2bed75198f7e7bf322928bc6c690421e2b960a085d62c77c5. 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/79b47bd0-969d-4286-9941-74364633fa86.json and https://artists.proofprofile.net/proofs/artist/79b47bd0-969d-4286-9941-74364633fa86.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 0x9d75b8632ff931c4107201c43a28edd8f552306cd26387edf7f1c14643c08bdf. 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/QZ7R42050360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1254ffd0020a0754af89b0ebcc46fb4385c6540c5d044ee99285b4bde344e7. 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/QZ7R42054229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e0e5dca19a1c3013bfe39418bfdbcc309647ead8857bebccb06d618bcf2041. 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/QZ7R42050800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4425ce6213a0950093de0f02e2ef61e86a055cac2961945c0c65204b28570fa6. 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/QZ7R42053214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6120f13982100f1555e940d9dd46f3dd6fc0ea4d9d7de80ceda8928dfe3332. 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/QZ7R42251048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c2c19331138033f5807b1396e5a86aaa44ed827ce7f46c7817fb6641667ef9. 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/QZ7R42251049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a73dfe09218feaa34daea0e281dc99177063a736a7219197bddc0b17e7e055e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZ7R42251052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a478cfdf0435610a050730537e44b47f27dc27b52541eb980dd9d9611c228d5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZ7R42150233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c8381017c7ec50d1f5c91261e2ba30ecdf49e83cea46a7fcdb2ab939aa6193. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:57:38Z), 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/QZ7R42251047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a478cfdf0435610a050730537e44b47f27dc27b52541eb980dd9d9611c228d5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZ7R42150233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f14f96d9675379029fd94d6232d59e5b9d9933d9fe66f71fb815f782befa761. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USCGH2105647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1254ffd0020a0754af89b0ebcc46fb4385c6540c5d044ee99285b4bde344e7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZ7R42054229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4425ce6213a0950093de0f02e2ef61e86a055cac2961945c0c65204b28570fa6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZ7R42053214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e0e5dca19a1c3013bfe39418bfdbcc309647ead8857bebccb06d618bcf2041. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZ7R42050800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d75b8632ff931c4107201c43a28edd8f552306cd26387edf7f1c14643c08bdf. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QZ7R42050360.