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 0x6c65aa8d65e492862449f54d87f3d683d16e3a532770342eacdb767fd0b89114. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b234e303-fa2b-4eee-80c3-e697a5d91362.json and https://artists.proofprofile.net/proofs/artist/b234e303-fa2b-4eee-80c3-e697a5d91362.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 0xa644e1f76b82d0ce6ae9004c8036bdd840b095f8662b2d7e140df2ceca3becaf. 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/DEPI82410127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a5464a3ccad4c4f5cc4a27ffb1bea6673e5d3296d08c6003a279154f691ccb. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/DEPI82410128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c0adcd735a8755715dc5fae970ef1d0440b6a774eefdb5b82458c494657356. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/DEPI82411624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0943b5f390b076ae93c554485f8f60fab015b04fafcfeacf52bbd4c98000cfe. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/DEPI82411625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7450f5828a83bbd7132014baadd94a0b76018e065d3279b1731c1c270e1e3c9. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/DEPI82414176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a972d8d5b1a1f3d47209a38cfac78c2db6fe787cc896f7ba2cd00ae018730e0. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DEPI82414177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0439c6973367549d01714481b717bfbcd499d29df1d9a78106303353be97b5. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/DEPI82414632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732a560a70c6a586a1a1e747020eb7f169f4fedbb13793c32e849882c8c7c12b. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/DEPI82414633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ad67ed7f94585f39b4cb78e10d4ead69d55c1ad1a7e03f6e9cb7b93323fcd9. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DEPI82415166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800aef5a0ae31ba4760ec2b9b70238f36a050aafa43cd137129658d169c24562. 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/DEPI82415168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e3be1dddf54616d9be8df57737a57d356013247a12bea3dd98016a5d83bc3d. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/DEPI82416078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa817731b4e95e8cae3c39b0cb1222017e604366f280e405a58aa7d555b4949f5. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/DEPI82416079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc74c0c309ccaff15c301dc535abca8f11f4cd716d76beb64875deb88aca2d35. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:59:55Z), 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/DEPI82417414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8cbf2be0b96df6bf8be182ff150991dd43385a2849398844c2a2080f9e2f5d. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/DEPI82417415.