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 0x80409434314786c6fcdf243aa9e8a2f78a41fecf5118253257da68ec2905dfa9. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea93bfea-5eed-4655-bf84-990da773db60.json and https://artists.proofprofile.net/proofs/artist/ea93bfea-5eed-4655-bf84-990da773db60.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 0xfd2b5dbcb876e65ed67f95b925166c80a0d2e13a07590bfb58be8dcb16a52691. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:44:22Z), 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/USCGH1953511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d13b220c4849f99515e185c2d3f67cdfe6a241a03ed896bfb95e4eed5eaeb5. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/USHM82001227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0ca197b1915e7de937ec21b30962d908d52262f143a720054cb2faef41819f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USHM82001218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8f03737adccc6ccbb141edeb492ec2dda90c5205309f74f9207578a7e5306d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USHM82001219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce26d26c2b2f150aeed92c0da3bcefa7a286491e4f9bc2f5ab7055af4b513d8. 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/USHM82001229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6769aec432af45c19af34cc4046965b1334221fad28d4f78b8de5465fb4d04. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USHM82001210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19b1c548b9b38fbc795fa294d5a1e1c23e15c477f457a81b10aecb5f1107f4a. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:13:47Z), 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/USHM82001241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c9a05b8fc3c7206595112349912dd81459eac81c857c949dfa93c23c791373. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/USHM82001222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67bd6fd58f33339375a3033741949867203c5e789dc19a031421adf82328d907. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/USHM82001212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1778f9d968d9e2600320fcb1761760b5f1e0f80622333fe68c2bacaa50858f47. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/USHM82001213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca28e928296c8b4f39272c70b950c3c48b86abfab4c5a7e6e37210d06971fb7. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T07:59:39Z), 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/USHM82001214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571239ac3360bc6933f50783df7eb9114c0314679c63b875bd9e958318bead9f. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/USHM82001226.