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 0x1756be3e145b970b0cf06b782dd803bebbef677f672c9708a433795f6550bff9. Chain 2 (Bitcoin): anchored in block 953598 (2026-06-14T06:40:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0c774c4e-7996-439b-9b69-cfa1b9766cf0.json and https://artists.proofprofile.net/proofs/artist/0c774c4e-7996-439b-9b69-cfa1b9766cf0.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 0xca53910c8e873e915828ab80483574399a4871eaf86d8b87b5c51f1c8cf7cd27. 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/USHM21582588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda928d41af04a73af07a8cde0a0d352103b3eec3fd5c61e73d39fe5e6b152bf7. 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/USHM21582589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a5958fb5b22bcee0cd6102b43c2ec98e5683fed8a16c4a656a53b8c66c232d. 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/USHM21582590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26aa77b7aaef7969f4aadc3158e5b30762282a49f685a01de2b06358f7ebc53. 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/USHM21582591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44659bc0d03330b8c69dbccd332f48da50dff11ae1515c126587aaa05ace5318. 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/USHM21582592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca5ccef93ecf32356b9c560b8ad72c981a53af1b3b984d19cb888b499eff5fb. 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/USHM21582593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ee289ac89108addca5291aedfc02bfa16be70f2d65b06eafef143d50bc6959. 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/USHM21582594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99ef70f5f21923db8eb34727a6f7445f08fdcb4ee8bfb09e6dfc2c55a6fa4b7. 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/USHM21582595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a2a0fc01be6107289a68ab015073ad1007e0ed4bcf5d74286c727e1c9bc182. 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/USHM21582596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ffc3fd4399be5f5ffb7e1fa838ec468df7daa3a07948f7e8bd4b71158f94bf. 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/USCGJ1332132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62176ec603fba4d1d5149e4a5686e5d28e18a8987880f636458f90390d39c56. 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/USCGJ1332133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9614c883bfa3abb8f592f278f04134fb3931be91971429cafd27c09e85e74cb5. 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/USCGJ1332134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5008ef76752d714a0679e3adae34dca2e84582a0b6b1a6604250048f68ec2d. 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/USCGJ1332136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006a4f5be9e0a82ee5fc68c36fd230a95d5722ea97b212a6da4429922cd985f9. 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/USCGJ1332137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890c4bcbe7d037cc659cf6a3e77ee8b908ede5b8705e22912dd651b97995268d. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USCGJ1332138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b711c4b6207236008e5c304261a8c6c6833b2ae2a66b93f24d088ced87221a. 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/USCGJ1332139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb84aeaed9dbceb0b069893233b71bdd2f34cecfa10b87a83c8abf21fe2503d5. 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/USCGJ1332140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4369e00153af2e9a6f2d86e6eee83f2375e9dd9b610402833c6c4d34aa613d81. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T18:10:17Z), 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/USCGJ1332135.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775c6cfb72f99e1ead9ef19ccc3a60cfca6dc6833eb5856e496b25c2ec3c11b7. 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/USHM22178398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c050e5ab4cdaebd404fee5cb8444b6db5d82328a990383ed99de33b098a51a6. 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/USHM22178399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09c88e8741fc3482ed4c29bdf25de89b80ff19b0fff26da9f472c1cdb0d6b5c. 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/USHM22178400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996fdff35403bac148fe9f749f9246c798aa9a70461f10f2b7ab835ef5ed314d. 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/USHM22178401.