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 0x3d0ddb1c4e88b6dfd0e787b9a4d0801e0a404b059c0d16925d03ff8073975917. 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/f59097a1-4edd-49b6-846a-9d45a519a61d.json and https://artists.proofprofile.net/proofs/artist/f59097a1-4edd-49b6-846a-9d45a519a61d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Hair (Original Broadway / Off-Broadway Cast Recordings)
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 0x724a5968d6da411cbf8c1e8c78d4ca8e11be05761870cad2ad24efd70ac4fbfe. 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/USV110300230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ffb376026415ad78e4ad6310e546e90a00dcf04f82479f30339e0e90a31b39. 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/USV110300231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c48d679d90959a03f06f80255bf0c7d3712c25af75308577764740b88d38f74. 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/USV110300232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4b216ba7b4082a56bd269e28ba11eb4c5744b4d2d43bfc4c850ed3cbb11ffe. 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/USV110300235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641afeb9be8828f8ea952acd6c46d824003c225843cee386569520b477b8a2aa. 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/USV110300237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4887575b208cb9cf3250d6af2379403a3550ed9b5e9ec173d2596c1d117c62f0. 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/USV110300240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345945b719953035c4b7d5a630fb1d870e08dedb9c57ff486796d627ba19aaf6. 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/USV110300243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4819789cce7ba0ecdc5d6632b2b0b46be19f7c1a7af402856eb062d19536d29d. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:56:32Z), 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/USV110300244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fe36f34fc0d4f5df0126e5763976a21235bdd20b115aaa7d539b87acc9e758. 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/USV110300252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00270396f122fed8195b4f9092e47be8bb39a76699b98c7f5f4ed4f9acef8daa. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/USV110300233.
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 0xc4362e3143d340193b13065fe2d746517c54a827d9c589327abbf1ce8e4b407a. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/USV110300234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e46ca13f23d5aca695d6d3d398c0b71d715d6cfb4354ef4c86ebef103070825. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/USV110300238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebadc58b4a6ecd63ebfbd35a3dfb4e50eb62430d3e0a0f1ccf0e5c64856bf9d5. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USV110300239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a8c570775356f7fbd834d9105c33777a07c22fdf83e0bce7951d2230d2f4db. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/USV110300241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9271b2254a3429399fd1ebe382b015e578e7a5ac1863e7981c2f39183b83a8c8. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USV110300242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59edb0b037d7276486f772fa5d6c226a1062a1c2db8512908b3e4b9ee7290c9. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USV110300249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c2b6e22955b48098359e84882b7d2ca60f11023eeb735884eb78fb05ed6ad5. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USV110300250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16ecfc9b232959a1a937bc46a951be5178f196c4369ee1621d97ef9466813e2. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USV110300255.