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 0xd23d94a8cf47cbc6a15fbe6c74bf0a33eb329f8d8d869647a26c922d11500ca4. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bea7e697-ce7e-4952-bf08-a1a705562df1.json and https://artists.proofprofile.net/proofs/artist/bea7e697-ce7e-4952-bf08-a1a705562df1.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 0x5b79779208f5b786942f437e9ae1fda40156342cf50b2d9ad20ea0eb8546c356. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZWFH2328159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221adb0a314161dd9b77db92cf44a874aba2873094f0f8e4cc30144d195ec908. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZHN32441198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527a33fa4111a90e6a75ec43259b41b5881c02bd93a1763d7d89d924a71c6cc6. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T22:58:33Z), 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/QZWFG2412267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2a811f179e89e5fcab60201e76c6d2953854e80fe5e3f5362d01bf3efc47da. 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/QZWFV2498043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053929712c7e5380a84574fa4521bf0afb16020fc73be32fd9814538c3c70731. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZZ7N2400352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752f35dee9189af2f2b86b335dccbeacd5579430e9af270e2d7bd505bd1bebb3. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZZ7T2435559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1813f50e0c377bfaeee441a6e0a31159080a044a2c71e5da1bcb43fdfdb02c8. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZZ7W2492766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650aa95d70356e8121d5c4bbdf95389efa79737c8d1edae66a7e9d09eeb55e66. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:32:39Z), 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/QZFYY2583584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e52cf81a80bb0c7e6f918565a1bec44e1cc848fdc9d0d4eaa63118c07f18f9e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZFZ22522132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b0fad1a076ad1e7ca51242eb5052dc9dcb3a23335ff4495ad346630788427b. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:45:35Z), 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/QZFZ42530475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ef0f124abfde98d178059f167d469a83bb85b580d9e46f8aa49e8ad555b0bb. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZZ7W2490884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c82a3611fe48ecbbc13758a3852ea334be3c32ea882799bf3c75fe24aa7397. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:09:26Z), 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/QZDA72514705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698c5131245831d1aca4536adc6e612ef1ec835153ad02336853e353f83739a4. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZES62540873.