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 0xf3cd1b720d121f0bd3cf508b2bb89d9af8eeae28a1d205b4c094da153cb7ef68. 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/fb29e039-206d-40a9-8d5c-672a08b5f354.json and https://artists.proofprofile.net/proofs/artist/fb29e039-206d-40a9-8d5c-672a08b5f354.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 0xd72e6ed1a4341034cf4a66f0c3be4f43b25ad776d139736c23850e8085ca39b6. 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/DEYW82208462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2881e9712362aec97ed3b7dd570580a7f92c12121a066c786d3b1266c45ae66f. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DEYW82301989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf49231c46fad307f88322b698e6a3389a9716263ea31e2e3e55bfd2a3eaf8ef. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEPI82442883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25414efeb95dd93802307792bb0cbb3659c178336d9c0587a9104db0674b5239. 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/DEPI82503682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa2a436891e8a29923a7c916d4f16f42e5be8bfd0894e25280378c0481dc2ac. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:29:07Z), 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/DEPI82512540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25414efeb95dd93802307792bb0cbb3659c178336d9c0587a9104db0674b5239. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEPI82503682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce14e515869fb0314d32c2e5e24df33deef6fbf2a0f073e6dd8eac4980bb200b. 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/QZTB32476637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b88cdae463afeed6bf8938d43a366c7a7e4608ce5f36b5fcd83cd13dc82c951. 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/DEYT72200603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6181b0c1b503f1d83003aac280a11b6e516a53d229bc84c0dd8df0c14eee82. 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/DEYT72200325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad675dcc5000cd73f37b29b52c99289133f98fba084ed797a2a84f5390b4e57c. 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/DEYT72200388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef23ed8fc83e33b5847fcff7a583f017665b01d46200ea834e21088eaf3c6e9. 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/DEYT72200420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0677618a02a0e9788be1d9c9ee9f43340f464f6d12e053147e8be05ac7acbb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEYT72200033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5ad0aed58f4c916561bac22522a4ee902ac59186a15537d28ac78961f958a3. 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/QZFYY2250875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4946f596101c062b7d28e9f59a000344c7a258b614c92724a24168d98ecf5006. 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/DEZC62436008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b19017226de38c7fb36aec19d4c7d91d1a4324d31a166f9b694c119217f9a1. 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/DEYT72400211.