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 0x2717da74ffe4087efbc1fbce9c25b7da054f12b1c6a6da0511685384b7a39338. 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/e4931912-9fa7-4cec-966a-536e4ee8b642.json and https://artists.proofprofile.net/proofs/artist/e4931912-9fa7-4cec-966a-536e4ee8b642.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 0x1c468f6fa861357eb4b4e2ceaebee212f0ac5697a571340e00e9bddddeb35bd8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEQR41600378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50cbd31cf28d64d32ebc3f89c9f891212ab4728b896ab5bdc00490a86b03151. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEQR41600379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6adf090cfac56bf4b5d7ca0747f7ad67bbba31deac8a00db66f64daad908055b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEQR41600380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3dfcef0cd833e782e26081f566d32c447ed598337d8556be2210d07ca000a9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEQR41600381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9259b4878a24a023b73522d873532a895f84ffa9743da9f5e1b826dedb18168f. 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/DEQR41600382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4142283702019bbaa910bd9c82356222686ec2a3aead01226dc2eaef34fbc2. 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/DEQR41600383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7cd4c912d1da7b880b142e93b243c683fd11364cb03406045981b7a3e32faff. 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/DEQR41600384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa1378cf673d40184408995bc9e691cdba4b32bd1a7c01d32175bacfc793e43. 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/DEQR41600385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3182410826bab529697842e00b1b02be32f0d3f2493a0128b9dbe83b59916e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEQR41600386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69285a132d364b1bb7c9db8bdda0a108ad13d40fd36fd08e4b7ee4e9951ed149. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEQR41600387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6b4f2b776e72f6e45c057d4850542aa2c74136e52b3ff4f1e629bb6f0c39d2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEQR41600389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57abcf045a2fa277b60b9ddcbc7445ffa6761b5f61f2b3408ef570592426566. 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/DEQR41600390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6240ef87014589ee05f70a4be92435d03b8e564018f8bf889b3f9dcb4758ee5. 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/DEQR41600391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e298ec7f22daf694d3c0238604db84f3b009c783e2d52c6e6b8e57dcd62b29. 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/DEQR41600392.