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 0xde2b96fae24f3390da7cc579868765e6d4bd496ab9730924489a6b6480188c3a. Chain 2 (Bitcoin): anchored in block 954502 (2026-06-20T05:07:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9be4bd47-2c7c-4938-90d7-e0a1c99b8f1e.json and https://artists.proofprofile.net/proofs/artist/9be4bd47-2c7c-4938-90d7-e0a1c99b8f1e.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 0x2a05cb11bb38b3a9ded0493298d21403552ea3dfb82f6f5dc0f7039db374a9c5. 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/FXR752410636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd627fb9c41602df48faeeaf5e25dd1a478103cdcb5d36ec9039faf3c1b10365a. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/FR9W12460763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0ffc999e059e0893da6d16ceae309f8f5fb1053759ff4bf5cd78c013d06fc8. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-20T00:05:51Z), 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/FXR752409722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe023666d71d783d447830d52dd3572e96c55019e6f3451b910668e70549b8d0. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FR9W12460766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd95bab4212aef9cf3a76224b2177c03c5cf0a3b99d67f09f05c51d799576e0. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/FR9W12460767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668dcf9cbea7363958b139b2620116ff78866ca3030fd191db806515a7a667d8. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/FR9W12460768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2af6e663e23fd96495622a0f3b51e99832fc410b9fda9f2325b9233430835c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR9W12460769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeaa9ae10753f63b3b9869264336a52272a61d10042eb08b1cef026fe819d6c5. 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/FR9W12460770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223b242871d49b6b7649ba50bb65e57f92918de3b630132c67d2403604285c1e. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:04:16Z), 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/FR9W12460774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895a886aae819a9f648fa602ad0429c5f38d3d3d1bcf542b1bf26d8fcc71e606. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:06:58Z), 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/FXR752410638.