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 0xce966c7c90c0141a088c191f820817883dd1c462ec50ccb0b350a71b9289f8ef. 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/89b7f730-ec9d-42b5-b1d1-0587980d0fe5.json and https://artists.proofprofile.net/proofs/artist/89b7f730-ec9d-42b5-b1d1-0587980d0fe5.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 0x9a4b7ff7530ed3bf4d8cc09ed86431b5d71e3d374671891e59965ead972628ba. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/GX38U2271029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dba35d8046b729b703b1d23b471a577a614c917a5eaeec9e9e71433002ef633. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/GX38U2271037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4b7ff7530ed3bf4d8cc09ed86431b5d71e3d374671891e59965ead972628ba. 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/GX38U2271029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af936ae020990493daa21fe20d6a320b7e0206cd4919bb821f1afae3f9bd51c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:53:12Z), 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/GX38U2271031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc329d81395de4bc90b4e03df4d160635c8fc4cb1db79a28f1e9975c00c657049. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GX38U2271036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dba35d8046b729b703b1d23b471a577a614c917a5eaeec9e9e71433002ef633. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GX38U2271037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8708987f9251636b71db85befda13ac51a7b156fc2b7c6e261797c4a12b0c55a. 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/GX38U2204099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f775eae6640deb7ee763b32ee262d0d9d33d43975ece509fc65168285abe65d. 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/GX38U2204100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3037e15635218cafe2965ff97a0cecc30a6500e8234493bc0d3316937477d0b. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/GX38U2204103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d92734ca29a41ac63de76541466e04432906a66600c214fb4b69df3503c6303. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/GX38U2204091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3037e15635218cafe2965ff97a0cecc30a6500e8234493bc0d3316937477d0b. 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/GX38U2204103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1bf33790d5dee026a283332e26873db172d7fbc1b074c04806aacd0d7b012cf. 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/GX38U2225196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efce0fdf3b08702056b236e6f3129cb7f542446ac04ed07f2a930f5663053a7. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T17:31:17Z), 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/GX38U2239618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f415d6c7276f77f8c663debc3e22b5dd23ef33c6bcae4f545c97ac93430639. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/GX38U2239628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5375591dfd9881d47b9c11230ed4d3acc1e23640846904eda415b6a0566c306. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/GX38U2206059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06b676e759703d044ef966ba12ed37695e38c4df8c77f3bc2e958c7868c243b. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/NL8RL2513130.