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 0x90a31b4795f129592a3a21c0d98e8e627390efb027cb020c2e6b5f54e45656e5. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/85872b30-9ffe-47d4-ad75-3c7483fc7cf0.json and https://artists.proofprofile.net/proofs/artist/85872b30-9ffe-47d4-ad75-3c7483fc7cf0.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 0xbe87fb23d8f6e890db9314f25c78ee2787cd78104e922278d5ea23b7a623ed9d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM6DC1609605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724eca55869a03d5297ff2529504dd1d74a2adaf1f580d67d1be2e5f54ad1ad6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM6DC1609607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f939d5249fc8db7d64f54529051d64491c746c3db08fe8f331cdd1178fe2205. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM6DC1609619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65df74b9b64b07f02d37847fc3b2b5be371256adcb844c6404ef3788594f7d40. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QM6DC1609606.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76da0135b6a5d154cad930b84ba4bfd882e29308ee5780281443ca63329af3cc. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QM6DC1609608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe573056a095b1d7336964a30c1b58c1b2f9a1610a0ab10ab1724d846841a22ad. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/QM6DC1609612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e482aa11c1c0a59a0ef755e6abf6d2e2117c516d54af86ca0650d428e87636. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QM6DC1609617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818471d2ac0b9decec2f75c118df1cc22f65d59477588194ab524bf2a2ca0d04. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM6DC1313094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034e58c61c404ccf1d6fb025e2532bfb238b00823848952b88ca113a118854bf. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:22:51Z), 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/QM6DC1313096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257813a950c323906653196ed3a02f9880d014850bda21253a1abd61061c28ff. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM6DC1313099.
Pop. Corralero: Hace Un Mes, La Pata Pela, El Panuelito
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0c56a4562f5eb5b8278ec4a6ba96d3b80cf6e8b34a254daf913f5c24e7c015. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM6DC1313101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d512bce1f62bbaed4b2ec9e7eaa45bdfbf2d249ced2052d63c50980535bb02. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM6DC1313107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6c234773ccb5114ca00a1bead52ccde5541ec2a26e3b16df703601a3350bac. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM6DC1313108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99375ddadaee88fdc52cbc56341298a66a6bc7219156daa500c8999ed3856e99. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QM6DC1313095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86aa9dc8e1a4a68a8499abbf9339094a90e3cdc04cd393f20f19571c1b6a9e9. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QM6DC1313104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34060588f1a6145ada1904bd0fd941b7fc810ce5bce0757048f588b1513927ec. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM6MZ1431606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5df68c1a8ea0ff423b2dd8202a83e423b8731e8705abcca9cb2b37de8db6979. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/QM6MZ1431607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a9cb80626868173e3b3958ace9f857328639a977b77757b7c0b0eaae9b0a7a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:54:05Z), 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/QM6MZ1431611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61da5f847d42256e6be3b65942f296c5628971541833aa6e0452a4e34fca7938. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM6MZ1431613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40019a18a8c655173c9ed3aea9ca5aafa2d58e6d64a99072d4c803b40e861ef5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM6MZ1431614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861dee25e1b8c616f60590e0a13f7a4933a3f02471cd8082dfe4f7e0e0b3529b. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QM6MZ1431616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a4602ec348531f8d5b99f3bafc4e117b04a175d2a04e6c22e67222c00dfa0b. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/QM6MZ1431618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5a09f4b17f9333c85dc6f45b3e70e9ef4671e475f50ea3f14949f6d81de1b0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM6MZ1431619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6761794a89cba3f9eb3c7a1f364815a620dff79c00679af726ee26770ebfdec7. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QM6MZ1431605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7142dc2e82d1009ce93e10ce1e62cc0f95706a11e7dbe1c83a0a0788d40974e6. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QM6MZ1431608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12f8a659fc08cde2a6c7a40121c4288ea0567a7ce0c015e20cb86873ec76c3f. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QM6MZ1431609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac39b29665a7fda8d9008b5de915773649beb1fcb9c65b45838586f8537e906. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/QM6MZ1431610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5677fdc0c8a75311d0007dadbba76dc7069a695c832e71825304faef2d32044. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QM6MZ1431612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1e2b2bc29dfcb43ca70fc0829e982b2a5bafe8f5fdeb63bb918b10b427db87. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QM6MZ1431615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d77fc8d63efe7d9c58754739672ad7e5217d6234af5025399159d715689c5f. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QM6MZ1431617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8201fedb4eb85b0009f117245c86c379054160ebb7d9b52ccf2fdbff1e43fca2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USJ3V1118556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81503874f8752dd4bd3498a20dbecffbd0420e1d891a0196ac64d50ec7abad7a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USJ3V1118558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa793984c663ae4898da16487ce86ed837f8ba051863eb50f007b0cd82f4e51f7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USJ3V1118559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8b68790ee97cbfbf25f857e85a6696a83f14d7942799ae28deb6d7a05d7187. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USJ3V1118563.