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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf073b564ef12fca5dd1d7f55d2e3af5f3e593a55aa9f55a4b5dcd4c87784dfbd. Chain 2 (Bitcoin): anchored in block 954004 (2026-06-16T21:01:04Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/32bede01-6116-4a86-b767-71eebc8c442d.json and https://artists.proofprofile.net/proofs/artist/32bede01-6116-4a86-b767-71eebc8c442d.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a9f936c01e3002fb389643bd4979b3936d7b7442931f5000deed4574ce28d3. 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/ITI291406701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7198fb7780b9b738b2a6af5afea87175b07578d06f7aed444d1de585bb02fe9. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/ITI291406702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3384e36fb4b30ca3c55c68e60ecf7d8910b2cb2049ac83c97a90a6645d8098. 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/ITI291406703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe966442a08f13e7259523d6db5e3c7816534c673031d7cb5653df87913727132. 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/ITI291406704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e7e3372d262e101de2cb1aab55def974755b60a5d329686b6329d81075770d. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ITI291406705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe735721e107170243963d0770e827b206b307121c9ac46fbd2ebb0b2478ff4c7. 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/ITI291406706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41418646a3f497660b7614489daec2758254cba001c5b88c747c9462acf1487d. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/ITI291406707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19270a382c996f90192cac6c70a1f238f7fa27e1a4e395efa1fa36b90cbf5030. 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/ITI291406709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8246950d1dd67b8c0c5402098d04e9d2672dd38e70d0da8f66933ee10d12e2. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ITI290802901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169e2fbbdeb446b702a1e39302ee85711299a12bd7f788bdc46663ce0f9baafb. 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/ITI290802902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359167777f55aca587272b55fac331801d701c45bdf604f42bf8aa639f0c26d8. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ITI290802903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef39fb8ec5e25e9bb716fc2faaa4d1d8887325df0d0eb4d5cabedbc87baaeccf. 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/ITI290802904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b135326f7a7c5ba17d7c7d08cef9a0a13ece3f6d7d8f190b866396e7f79120. 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/ITI290802905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc809065e6b6983e478fdafdc82f240339f12a260aaebf3d661777dc56be3af73. 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/ITI290802906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99344335ec015f7f25daeb1df4eb55c00cb9b27aaae0613263a5646822ce9afd. 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/ITI290802907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0001662bee1212cfe31b8cd093dc8800e7104e2a14f7a5f1a26cae99b8ecf16a. 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/ITI290802908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2d057ae13defbef635bbc3a593440bed2a3f6ee2b758e64704a248dc40aabe. 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/ITI290802909.