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 0x3f41d4c051879ea93e20f84679d094dcb3f1b497d7886dae32e9b1ca2143645f. 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/f120d8b8-af29-44a6-9088-bcf3fe43bfde.json and https://artists.proofprofile.net/proofs/artist/f120d8b8-af29-44a6-9088-bcf3fe43bfde.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 0xa9a8409c970b2d4ba2cb65b836cb8bcf088f304bfbaffb85bfe03599fab4c6cc. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:14:07Z), 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/QZFZ22111541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55036a96607e9a4092288b411337d2668b51d4e7084bc99adc719389cd161355. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZMER2294786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ee65baf3220ebf56824887ca45d2d70df0a87c951de13dcadfef733b973e81. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZW9L2225246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f92f8656a5c862e1b7c32dd1f6e0748632abe984fcafab1928d51c45d67527. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/SGB502390739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb7b588c03bd31f7cf12657ba7f9e1d038c3e55830b07937b1242b3c637ada3. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/SGB502253041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd54e118578c6e6c8a3f9ee8aaae69d5c57106b01c1f986402240dbb94e2242. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZPEW2420125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1f252b9cc3429f35fe2094441b0c3e0191f4e568dc85a0c181c07b2d8b8903. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TLVEM2443358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2c70661aae74f4065777cfc21f46020a59c3b344ea78922c007a34ed960edd. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:39:42Z), 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/QT2VB2441783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b21100ed66dfe92cd5a8bdd5dd40206120d6708d22965c34806677eeb90aa09. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SGB502503696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16101e285e700b5f412577738b00f41cc87ea9edc8ff741700e62b39d68da6b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SGB502509648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cbf4829ef8a8b2f333d106985a920d888d8a6d7a8d33cde414853a10cfb22e1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SGW502505543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa483ca9dd357f65fbd56b2e11dae1b10fb71a225e6342f7511041771ebc5195. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/AEA3A2041689.