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 0x8750d22897bdc12bb29f902b8aeb6fd87f735b6e15fcb5eb31255414d49dedec. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1451984f-6a7c-4a80-b2ae-797f25edb9e2.json and https://artists.proofprofile.net/proofs/artist/1451984f-6a7c-4a80-b2ae-797f25edb9e2.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 0xed5bb8521a480557f413290704ef4cd285c6fa586ad495123cd14e35251b9a42. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:08:46Z), 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/GX3Q92563801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe5948ca8003497de19ff30159f2e40262df09f1001beebc89fa3a14602e6a7. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GX3Q92563802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a18162572bfb4ba679c780a42ce689a301bb47c3acde2ee5095cc02b0b3b73c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GX3Q92563803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48172681c7ed3a72053680a60a85c4cfed3c89598fb5d532d89b8ca55fcee0fe. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GX3Q92563804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566ccb1dec55abb790c244c7eb386153fd0daf68faac105827d657fc15c40338. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GX3Q92563805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65bdfd6b3652deda2650eb4e224aef98cc2e8aed48f79c4ad70804a11438106e. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GX3Q92563806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d05315a3319dc2ef25faa437af952c1e692f10e9b55d0b971cc02dd2c13ddb. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/GX3Q92563807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b08fcb85c0cd2399773182b3d1da784851c711a640ba26fed961804b9572ff0. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/GX3Q92563808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679019c61988fa5ce66e0a6f461f24bbea3da84de67fe8f309aa740cef7b3a67. 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/GX3Q92563809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63d717295bd4b34ad6c71485ccd9a42badab47e4903b386d8c76bcf98762b37. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:53:48Z), 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/GX3Q92563810.