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 0x9e2d720c151470e0566b75d0c5961be955dac25a3874adbdd6656988ab3008d6. 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/760b977e-8bbf-4143-9a37-f319b70abb61.json and https://artists.proofprofile.net/proofs/artist/760b977e-8bbf-4143-9a37-f319b70abb61.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 0x91a005f7ccb089566f0ed30af07c69c2f8a2e9ed802688620fdf977e4ee385f9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T01:01:21Z), 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/UKGBT1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58af9075d94f60c3957149a7d9e470f88aa175d2b96612cc7b11149f99cd8b35. 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/UKGBT1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa40069603fc97b5b35a0ed40118178ac86f47414c29284fe9533f6f9ec4855e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GX2QY2100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff7e75ec9ced3bb0797e0ec33caf271fe94d69ae58e25e0acdd7edd3d8b2584. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/GX2QY2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54a26163cdeaaf76fe8710f72872d144971fdc8a61bafcf2cca5f2e56144fcd. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GX2QY2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9339e3af9676623c9dbe765e335806aff8b5e04a0253aed9950589b497b95d73. 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/GX2QY2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e586239e2b23cf25b8a4832fcf66aa831339a486345aae9d0e32667b5359403. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:39:10Z), 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/GX2QY2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c3c3a762fd65a8a31e7c4e631ad2b5a3bf331b76fa07f18c978766db43a41f. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/GX2QY2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0c08a415115e4c47bbea38e6fa0e4a9f9b0da342b28bb223902cde32bc4a19. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:52:58Z), 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/GX2QY2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55d3fad503d030f03d7ef7bbf96790635f36e4f4e396acdd14982ef4f2cfa6d. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:42:02Z), 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/GX2QY2500005.