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 0xd20808d840a9166da8d3f92de5b048b82fffff578863dc4d970fd7bc96b1a4e3. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7fdb686a-2170-4b18-af59-ed7b912c1f4c.json and https://artists.proofprofile.net/proofs/artist/7fdb686a-2170-4b18-af59-ed7b912c1f4c.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 0x17c337631383cf7ca2d7a6f44d25cbfbe9fa4ff218cd66fc3d335ca0e9389280. 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/CA5KR1919345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311d1e3704c0530d3d1697e1b9534b69c7f33bc09a39f130c069acdd0395af06. 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/TCAHK2332749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ec9d75a509c8a06b5b99e54aa3229f7480fd175316751b4cd9045a8b91c725. 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/USA2P2040206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21982461ac7d3fc97b5d603c7e77e05da0928153d39684e5d9973abebd979326. 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/CA5KR1838152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5435f55dbc8389b1cc94184cae475a44bba522357c0c0ee89ad4b257f5aab357. 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/NLS6R1702187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a655312fd008844dc7fa0db5e658c7c1bdcadd23069a014b3406afd8bb546f. 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/SE3OH1633410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d460e503019c2b893bdf816afb60a00bbf7fea627af892b0dd106bef2b13543. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE3OH1709248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0f311aeae98fc9135d8b6bffdf613c96c276a575b5977f4f357f869b0e366d. 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/SE3OH1727840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0e5c92379daefe5d38290f375cad7aeb898a1612b27073e3ede6a863cfeb51. 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/SEYOK1666423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefe7de921ec059a19488a4c407d5617af814c88078a6cd1333caa801b3be90f. 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/CA5KR1847716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822e6ba7adca1da3c2d6089b153504af08def5d6a57a7b1411d5972f96b40566. 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/CA5KR1843369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21982461ac7d3fc97b5d603c7e77e05da0928153d39684e5d9973abebd979326. 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/CA5KR1838152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78039f54e7c40b8b487e6d29eef18cc2c5591f78b6661b431f01c157b89a7dc. 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/CA5KR1840281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3db5f6945b5a11c57d84538649d1a4f53b1b1553efa14c9d60458e90b1dae10. 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/CA5KR1901370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcebefe46fe142a61425a7c63ae9110da28d9e03f83eb42a21a23caf36a71b99d. 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/CA5KR1912266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577b6c370dbf5d6dc818f1df77611df03013f4ff82be7b9fb0cafa3da238a1af. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CA5KR1839451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac229eb2cbc3beb589589b1c336e87b904c9d13d0ee6ae1dbfce5074f3ad4b0. 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/QM7282457530.