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 0x44e5b656f688786c5947e8217798918303b4da419db5c29c3ac7c8a2612ffc59. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9714f600-d607-40d5-8b02-17198757c9e7.json and https://artists.proofprofile.net/proofs/artist/9714f600-d607-40d5-8b02-17198757c9e7.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 0xe66d1a4a87fd8c1df3562a5c79a06f52931847ca7bc7744f7970bad0e61b2dc9. 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/ES75E2402575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98121b8b2c208040191cb99be89e2a2a602c52a238dffa552cbb0c9dc0246ef. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZGLM2188293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985f394cdbce0442d96e09d0aba4edaaf0abe37c0ae5ad7afd6408ade6ddd024. 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/ESA012152842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59db38232e1a51e4b4026c378d0b0f12192e827323b8cf0464e90470f3fc6d3e. 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/ESA012209188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0470ec4e15ff2220d7c6a53b642da855116636aea974bdc798bb7bcbeaa9e963. 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/ESA011543339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6875afbfdc51377ea58fd9f2be14d00151b2ea9621ba70ed578fc95a69fecc. 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/ESA011582076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc670d20cc9733f0522bf3182b229f9afeaea1cef3d1b63060551a8d3846d72f1. 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/ESA012209191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca6920012aae6252ad38d3df309c8ee8e9aaf068aabbef6307b99260b78fdb4. 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/ES75E2303324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0470ec4e15ff2220d7c6a53b642da855116636aea974bdc798bb7bcbeaa9e963. 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/ESA011543339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66d1a4a87fd8c1df3562a5c79a06f52931847ca7bc7744f7970bad0e61b2dc9. 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/ES75E2402575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa7471cc685e0aca70ef6d2c03cbeefd3496001a53581dfea2cf5326e0b3c3f. 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/ES75E2403659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa7471cc685e0aca70ef6d2c03cbeefd3496001a53581dfea2cf5326e0b3c3f. 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/ES75E2403659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf2bc5e3eac8d8607a94c2f9d590df495868b71fdc02c578f7cfdd3884a3c52. 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/ES75E2307318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a0fcf981d20ce0d84c96beb60517c382718acac519dc382697a31fc180ab2f. 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/ESA011533802.