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 0x6e16ccfe1e6e32ef63c5d174105c639aca286005235a4d2729a43daa51f5c394. 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/2000d494-4199-4105-9437-a60f3f865b51.json and https://artists.proofprofile.net/proofs/artist/2000d494-4199-4105-9437-a60f3f865b51.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 0x78f904b0c45782a15a8654fa3af2ccbdc37c449321278d1a64f9fd1895250c08. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZHN82407933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50373e1c4081ba5892fd4bb7ad59dd0c28f29d6c7073415c44d61005f3fcced. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZHN92436504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6100b71d574458b9582314f0dda7514c56fa6cf828a4f432769ea02e9b983e1. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:05:49Z), 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/QZHNB2476737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1173dec5e2b8d35f6ed30ac195084143b133063b445a5666c4951def81be2bb. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZK6Q2489626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a8568538585f5183e72a4d860e43030e9275eddae9c2381ea4486fe0a366f2. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZK6M2493704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b0a98649d150c99f51ec0304b2b363f0b35853aa86014f1078946f6564e2a3. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZMEP2406202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fab262212396acea60a5ddc5b354db447d281fbef2f65bb0f2e483d53ac232a. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZTBD2440109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b237dc17d86b2d6756b0f7d38e46e4ae30537b1157231c9ce70fd309acbe6a. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZFYY2516773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e86281754a639630ac4695c9cd902d16a6d4e5c670006b1a46200b9bd22f062. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZFYY2516774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d12e62a508af4635861eca075aed3f489c4e2569481b8c05e415c93d875189e. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZFYY2516775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33cf302a05105952bd9d8c4716f205d98d974b85eb64476891f6df4ff0c2e566. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:08:23Z), 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/QZFYY2516776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535aa13c11f548ad8ef5e6858c7fe6eb91dd46c107f58af067e2bab955bee394. 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/QZFYY2516777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac1c61c2ac63026c20acc0c5b2db326a2f4863339451cb313648f33fea74ddf. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZES62579492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7d37e0912aeeac8abedec15ff38bf9667043b8f5698f09dd82d44c6f0a6d13. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZHN72526317.