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 0x3fb32abd079bd610cf3aa56447e0c8b61d14aeacd4389a6fba5bb78c3c0c26fd. 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/323a1ba6-cc88-4090-babc-59f9148a6d46.json and https://artists.proofprofile.net/proofs/artist/323a1ba6-cc88-4090-babc-59f9148a6d46.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Saint-Saëns: Carnival of the Animals: Aquarium
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 0x97c838c530fa1bf215ca5866e9c893550221bb7b39d666c03ba70cdef9a2afc2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBBBC2000208.
Carnival of the Animals: Introduction and Royal March of the Lion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0b7cae546f0213d7bc58ad7ad49a1cc241aa0e02499b55969b534f9c15406e. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBBBC2000202.
Carnival of the Animals: Hens and Roosters
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe74efa56ae395c106dddfcfc67c8d670b1bf92abec28242cc7c4eaa9ef1497. 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/GBBBC2000203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0073b81de31ef5a8e2aac0066e2b4d77f911ae22b8c164b07f65442e4c77a3ac. 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/GBBBC2000205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c838c530fa1bf215ca5866e9c893550221bb7b39d666c03ba70cdef9a2afc2. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/GBBBC2000208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f796561cb175ff19fa6fac298c7a84c3d03b955c9925ed5bf29a5731a7f167f. 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/GBBBC2000212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bb7f6c7f28d297ecbfef005dba3bafa3a27dc1c149d4b5d50bb65b7e76b49e. 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/GBBBC2000226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6852ef15a18729d8e5821b656ea526a8223f020736e6e56af2cd3537223e64. 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/GBBBC2000229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9835435a3fa8951044c93aa94fbcb3c4e3e59ec11996c113f8f14a863dd5c433. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBBBC2000230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ffb9ad111c1a0d62cc6cfee6c8dbf0b199eaa3622117ebe2ea35a31d80e320. 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/GBF071900760.
From Jewish Life, B 54: 1. Prayer (Arr. B. Kanneh-Mason for Violin and Cello)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54362685ab01466d6ce27c81d154c3844cda83fe6f9ac57b1430b7c063a06afd. 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/GBF071900770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacef2da9ca8c159d4900d3dd40f90240b56015cba18f71615ea3ece000ee0ced. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/GBBBC2000187.
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
Carnival of the Animals: Characters with Long Ears
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1a5a46afb9c4b2d95b3d3da9563bd4f091ca7721f1a51dd0e304799735cf1a. 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/GBBBC2000209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c47cd49c8180d32752a1af84613538afb1b52277e8f7292db3eb9c91e960ea. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBBBC2000211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0fbcc54bcb64f48739a23459a2da59eb244ce03cca6d5567414047519180ec. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GBBBC2000213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70ce454cce6ca69b2298544d1db865bc31b4708aacacdb1cdd231ddd785a1e5. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/GBBBC2000215.