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 0x3c7e7a7b317db3e127594a740bd65d9507ec5b65f915fa90eda1869007da559e. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b9b8f91a-2779-409a-b44f-9b2b61044cc5.json and https://artists.proofprofile.net/proofs/artist/b9b8f91a-2779-409a-b44f-9b2b61044cc5.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 0x8b353a4dda6bce5926923194dab491caff945452b3ca52ef86debcd67c7d37de. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCABL1396808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b56c1cf2b97fcd696b37a4d52f01494074221afe8fa9a7338f03f30d12bad1f. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCABL1396826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91efb8224c2579044d970e152f633350fb02c5db47040578625fe586bc2e7d9f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCABU1439619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a02f54503a19c7e7f5abc0cb6eeb2d9715fc685daf939109487af5d69c18ee. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:37:34Z), 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/TCABU1439621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f0c940d365ac59a8150b803f57eba20917e7c6d37703fcb2d81387dd72f878. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:43:03Z), 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/TCADG1713299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b113ae5eb3cfe5c95ff8eb1a00024ef7b1ffed41c67188856feaf06b6975808. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TCADG1713303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86ef213c44658d755f38459409533440b9c5280189696928c14ff6b6a5f1bf4. 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/TCADG1713309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a78fac28f0c83d15911c1f97b308198c429a2001c8f09d74f2b040c0038544. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/TCADG1713319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd126de823f1a898a9ff995b1b65ae9abc3e382e812d6a439b7c5460d736b4f4. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:02:13Z), 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/TCADG1713322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343074523107c694c009edc151e80226600fe269b0c3948d0b28b755432b36f9. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAEK1980102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e710b886c03aeb51218990fa3947cf58219c31651eadf4496fde4fc02bcb02f. 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/ES7311600094.