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 0x917de6f1887ba141892fc7152b3f1ad29eabe884bc1250cc04fea696a7e14e7f. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6f29e4c0-e278-4e18-8713-c7b64dd0336d.json and https://artists.proofprofile.net/proofs/artist/6f29e4c0-e278-4e18-8713-c7b64dd0336d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Opening Psalm (Greek Chant, Harmonized By A. Lvov)
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 0x5e6a85653047d38f16a5fe2cfbfa5946282bae1384d7d903cd98a572c86c560c. 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/USA560608794.
Blessed Is The Man (Znamenny Chant, Harmonized By D. Jaichkov)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aeff46692c7e5bae58cc199b3893811304a3c66aa11439446c038bc7ba1178a. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USA560608795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68b1b4ccd5c2faf1ddb52b54e64592022c782dc3a88de37d9047fe9b1ba3f2c. 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/USA560608796.
Rejoyce Virgin (Voskresensky Monastery Chant)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01da6a471f3794aefc3cd4aeb769ff4eabb9a1fde4d0ac7b96e03b2437d28bcc. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/USA560608798.
Bless The Lord, O My Soul (M. Ippolitov-Ivanov)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01b923fefbdf21335d706390a5a709d3117476927299989a0792a4e8fb67115. 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/USA560608802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aff47f22c9f260c4b1437a73eae7017fbd25554b31039851c7d885446a18b75. 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/USA560608804.
Kheruvimskaya (Cherub) Song (Musychesku)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47968ab70100b788f6d8637669599c7c20b2da909b7fdd6f635693b36cc5b7f. 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/USA560608806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e42d8bd38b7f20af26b39859dbd55f6a7316f365382f6b5c178654c045237e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USA560608807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05f20af293ef3e1821963bff58664282f9e960a0d715b30a535c654f705eb7a. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/USA560608793.
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 0x71b0f2f6c27e3ef06f4a76b23ec0d642be3f69942d18f6be6cf4bf987797ab08. 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/USA560608797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42877d1b3f61d7ef7a6783a1bd029fd7289066d45c5efc479308b90689bb3eb4. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USA560608799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4de822e9a9b548f25e8d43b0c6e14b95cbba6fc083db12be4fb6e779af8d8db. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USA560608800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13061aa92bc2f9203b20e6a76bf6e89294f3924945cafdf4e2d5a21399c35b75. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USA560608801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d146e86d492f500a4299709eed41d997b98f67f12bfebb1ed0dc4860c38b11d. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USA560608805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a0d84e17849d0c62e792073bd7f1c480d631599d81927a982d4b672fa8ee4b. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USA560608808.