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 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 0x189cd801f0da24d822945f678b8bc1310e7d01586d13f930cae58422e5942e3d. Chain 2 (Bitcoin): anchored in block 953667 (2026-06-14T17:49:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/581e1980-698d-4d0b-b07d-9aedf6bf297c.json and https://artists.proofprofile.net/proofs/artist/581e1980-698d-4d0b-b07d-9aedf6bf297c.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 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 0x595c2b309d161da2758bdadcf51e140ddbe2205ea9ebe12aec188bb9604d0cb7. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USA4N1600800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d81a1abceff00ceb6c9032338e7a6b5408c9a4ef4a96d6faa08eb83739fcc4. 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/USA4N1600799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c27cc1ecd4c8a2c65081750fcde723e24fdf8754c8998283d458c9de170603. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USA4N1600802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5203d87a395663b06c32090f997209e3d6cf0da010a0cc6baa356dbb962133. 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/USA4N1600801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24102f8a3ac36a5591e703c86d7a1f68eb7895005b4bb6eaba1b2c5f4cc6f62f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA4N1600798.
Alleluia! Give the Glory - Mass of Glory
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75a9966596c69908f289cb2fb4dba33649507c74357b2b5fba58321263b8fbf. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USA4N1301323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe4ae28ef5c1a75abe8574a68720c5ce972086225b47c9e89c40d2739305cb5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USA4N1301728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1acd0b3267faadcd70fd91535c5c66a082d7f8c1df601740cd3bffe3a138c540. 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/USA4N1303761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85938f12709c17a0c7689866c07462091bf9ed16a7fb31628c8e6ebd7f8d84fc. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/USA4N1303717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe417fa1da7c6a31bef2a6d66d016ca2305379802403b1aa3dac601ead042c2d8. 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/USA4N1000384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd707b3ecbd0b26f7e43e297a632e276f44f5e5cfb6180981523439bdf2386d1a. 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/USA4N1301449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5e1bc984682626065a4bc6b0621e22344496cc81d325f763a162977ef8e4b6. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USA4N1301311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a6d085361dbaaad16890fa3e2e33fb4576bb0c3395f4de60d69897359ba9e5. 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/USA4N1301451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21855b37c64b4ca16d6165bc65d50512ed6d20cb51a51cf27627c6c350cd3a6. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/USA4N1303777.