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 0x8e0b6e3e2216f7012d6346595e5e299c6a856d0a72b1d6e0b203f8da455b6432. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7cf47b4-39f6-43a9-9c7e-33d53e9c041e.json and https://artists.proofprofile.net/proofs/artist/e7cf47b4-39f6-43a9-9c7e-33d53e9c041e.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 0x2b7b4e0461a22f112b6e74b46f0417394074d9ac16e0418833b72a7515563106. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/SE6XY2119921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e3f5134e6c3409da272db2fda0a9711b41e3c2a704028b680f531e9c5dde74. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/SE6XY2119922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91011e165edb5ccb9e17b23cc9d88c5aa2c222b914a3fba4b7543408b08ca000. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:27:34Z), 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/SE6XY2119923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e59bc65dd66b6cf280ce43f221ab4a3a1bc0136601b6e6bcfcaa24cb43ae45. 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/SE6XY2119924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7b60a62e11e1860b61bbdfbe125c67603d54e3faceaf9a7b7dbe3d1677a733. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/SE6XY2119928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff09b03cc8f143449a54fb6e8731c2e40d089872c9fad2b2d49545f7f3f4444. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/SE6XY2122539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4c55bdc8048c425247f4d6ee0eee666bb936a07a7becb7caec101a15343367. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/SE6XY2122540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30013924a64028b879e0aa9571c8d1acea9b8b1d81b2b2726b1519cdcac8854. 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/SE6XY2122550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc269467fa97773da994d56cea42b188cafecbeae22c8c34be17f525cc8e690. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:42:44Z), 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/SE5752288357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab35a0be6ed50cd42a8b86a2e010c2ee92a77b2cd9bf85334107ab3c07078f9. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/SE6XW2299536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2acc60e0de1e2b8bfa3b6548de7c41e7f4406dbcc35875d65f5c8c8879ea7746. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/SE6XW2299537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558aed60a79411b3e0673e30c46a60f2f7ecd01bcf2dcc151c8b9d633f21b047. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/SE6XW2299538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01be99ee94ea9fe1e3a62c5e6f0403c55ec2aa6694ce5a8091a10a8ddefa8b99. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:33:56Z), 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/SE6XW2299539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01444831d1f9c565ed81005f60fc98c6fcac6efa9513a069c59bc5c3e6963cf8. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/PECR22401208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db2efcaf3b75e43888cdee8bb6b6777834ffdfb8fc89254828d050e68c082a9. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/PECR22401209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3e543efedce4a9c4dd411e8b30ab26b818f053237dcfdf751f46effe9e3733. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/PECR22401210.