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 0xe541faa4e215d74eb021789ae7910d08faa7b03c0476f3a736ebc39b4f15119d. 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/9756e1b5-e93d-4742-ab3a-5cc6711d1e95.json and https://artists.proofprofile.net/proofs/artist/9756e1b5-e93d-4742-ab3a-5cc6711d1e95.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 0x571a615d949a2a71b666141edf34677e3c188b7c96814940b7f5b2c8e8705a19. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/ESA112448658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff7160b1f3cf9cadac11893b37f5dc6947c6d153e24375effc64b5d4190601b. 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/ESA112448341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897299f0c13184cbf9bc6a0dc1dcf3226a07496cecacec29b892a4a6cec944a2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ESA112446416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186fd0885b3b7dc02bab48d1e2f0fbe1693f01942ef2ab27b4e2fa28a50aa368. 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/BXP0K2400985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd3de6b20c82abe84848b3027728a00da32a022800be5fc013cb5ee31a4accc. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ESA112564562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89365d6654cacba1d7be767a41dbb48f11cce8a0ec2c50367286114e7cc79013. 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/ESA112564566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6dbae54f2509a22f6df6d452d4ce5a7949c171c4fdf75f0263089c844be59ee. 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/QZMZ92590952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3831da9ff1967fa52657f3aadcf10bd6e37aeedc358b210eda6bd6486ee4f70. 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/ESA112565654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7741bf62125e0aade3f804c0949f704656d2018cf9f3565600d3c0ff8d3306. 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/ESA112564556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4b51f941513fa28b2d4efe02d5b24ebc7c59f64abd14b5f7aa2187dfc4b334. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ESA112564564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141f0876c1e4e36ee1e4f117233c2c3b7cf737648c1235657f869cde6c897036. 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/ESA112564389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912651cb4426ea0094d5ab5fe8544f0e3d33940da4732ef587818c8b738ec240. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ESA112564390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f13e068477fa52a55437a9aac969c1ed2ab922f5e3d423d7ec9e180b6bd5f12. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ESA112559005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd347f57dfa773766c1d8335042fdfd0b5632e69598e803029303ca3ef3d778. 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/ESA112558378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba37ff07e0f202f649989f8c5bee6ab59c2b5e27f19be2386651f6ea2c406fe4. 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/BKGJS2300124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ea4faafe9ef385416d9ff8f9c727cec1cf2cea1ba19c70801ee955fe83324a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZMZ92411015.