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 0xf0b607508e469a22dad011b924a14b4c829f6a1dadd377432a8c399724e39f05. 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/a5aff2c0-428d-473a-9355-fffaed3dd6c7.json and https://artists.proofprofile.net/proofs/artist/a5aff2c0-428d-473a-9355-fffaed3dd6c7.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 0x99920b01e94d8460ecbc83d02a2c14e5272d106fb5369c1125c3e557fd9459be. 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/TCAIN2477964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330bc37f973bdf9ac9ddbbd749b2b95a6c9e09327c2d4441d74f8ba50b0fe55a. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/TCAIT2487289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a552833ab42784c3ba48c509afddf6ae6a78bbc69196b97130c770a705e5a07. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/TCAIW2495590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6643ddedcf4a5e8cfe4c64b4d32f8f2fe9ab8cbb5ce5512897b2ce3a5e70e54. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/TCAJJ2501819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10211048ea70a2b3bf91c4a7b347bd4677ae3cbace65c50189c636d63f4b3510. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/TCAJX2525660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d6e5fa8329d12c81e9d3bbc8152cd08d1d7ac2cccdb3c759fcb4ff1e1759f8. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/TCAJW2525669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1746440525f3f1f5e51132f31015e43f949c74b0b27da8deaf732f2f0c20e9. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAJW2525695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e85ab18b4e367c53f7f30187f5f7f9ed035965ed13ecb0a3ee31b28f457780. 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/TCAJW2525740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c4954fa919d94b6b234adc135c3140795ffff4aaf40af771f7ab2137d3fcb5. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:30:36Z), 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/TCAJW2525760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383432bdce8a5cffb05570bfb658bc41ea79d08881a163a917dbf626f3a9be6b. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:28:48Z), 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/TCAJW2525779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91d9e8cbd86c7f8726d0f8d813ce2a6e3c9dac1d7112133f65d2833dff2cf5c. 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/TCAJW2525796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x594d15d008f17b524860b09c8eead2c9249cb0a305d8209e7964266c566e489f. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAJW2525809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf2878790eef2ab38427dc382d79f85dd9c5a25dfab3784b723bdd27579f38b. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/TCAJW2525822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96cf1ab13064b313e3360a943d53cc4d62d5841e01b3d8349d56b5ee73197520. 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/TCAJW2525830.