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 0x337d0b04dccd50f814cd3073c78d28de27a7ba3e9ab0c8f446c3523e865519a7. Chain 2 (Bitcoin): anchored in block 953618 (2026-06-14T09:16:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ab74688-31f6-4b44-99ce-b1382c1cd328.json and https://artists.proofprofile.net/proofs/artist/1ab74688-31f6-4b44-99ce-b1382c1cd328.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 0x4dc09660806aede9d8230732d3726bf6ffec1b46854840bcf8cb81bb7ecb2b6a. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/GX53U2407045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e35b835f452b3db26d13109c35dc25bef9084443373b893bd95630314f0d698. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/GX53U2407044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b627c357e2c49ba267eec58bea244b348ea20422a3013a0f886d94e2ae75da6. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/GX53U2407043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a68131735fec0c4215c8c43aafc52b5b5ab1ceccbe788321b0916333415f8a. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/GX53U2420727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e96049f6a2c1cd9a4573e3f0b2a533579a080d2e5cb1d6fecd9cfab423d829. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:07:32Z), 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/GX53U2420728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8012e1988bb72c4660d470c763ce87121d21158e1bc56aeadf966a32e6779c. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/GX53U2420729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8f94942c1b7105020ae3dbcce973383af000028f026dd4a4004aeb0e0ccf2b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GX53U2420730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf01cb7a41d4268bae9366f9649ee2a9877ab8c4f8f66203de720112bae13d8. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/GX53U2420731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fba8b77c065bc47e159f191b191e78def9fa0c9c14d114909c7b8887005c8d3. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/GX53U2420732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241381704903896f3ce1c09ab634f210842c816e4e44c6fa7b5050bcdfc54241. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/GX53U2420733.