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 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 0x1a807aa935ee5d73624aee91cf5671ed5c4b81afe81d8d79e0f294a35c877d36. Chain 2 (Bitcoin): anchored in block 954650 (2026-06-21T04:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d8c389e4-8482-41a1-8c02-705b4414e092.json and https://artists.proofprofile.net/proofs/artist/d8c389e4-8482-41a1-8c02-705b4414e092.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 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 0x275339f0c9fbccbb435defc2b37fab767a8e84427f52c5de129d8293451fc5b8. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/UAMR11700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae34618edecf5bd12b8313e3c3d4513f03b3e833c6cb4b3a8c94b045d18c9189. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/UAMR11700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9ff3ee3e316914f196b2c22eade7b0544fe0ca7e41d5659735639ad10bef61. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/UAMR11700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196f6b937ef78e4e632ce78edca828be41bb21ada587e1a49f95df59a86d0c3b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/UAMR11700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd1550a0b3120e2153007aa327e6a9ba7cda0e1d814250ab8d233ea6e1b10a4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/UAMR11700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd053c64e37e808798fbbea968827a1ef72fe4fdd1b0b0121499ead23405871c0. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/UAMR11700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85154c405e572b32a39840168e00c6e6d0583dbc82d09aafecf2b09010519b02. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/UAMR11700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a88b55100076732375b68e9be053bea1de2dc32d653b14404e95f09aed6cc6. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/UAMR11700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee8bf8344f7c079eb123f2aae2777f11d85cf793dd58edc0f641925ea89c02e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/UAMR11700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3bd7b97db04e4dbaae7d93fef239988144a996ab757493c8fc4593888c816a. 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/UAMR11700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82948764ab1e10057611a62b07f1038716dbfe1ff4fb697bba01a3a4d4c8e700. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CH6541968832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46cc4410c7079f4933517b6914d032b23035ac201f7443830e5b4bdab064c9d6. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/CH6541968833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a998f54a3b0d159100ceaf864f82dc045762dbfe4a1bc8b0667699996647236. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/CH6541968834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec99b5bafd1831341840189b3475e710f709d74fd566dc84aebc3ff2cd53df7. 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/CH6541968835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ecd298297be18c00eadbc7db56b4e7bfe76354775046fbd01f2765161fa7da. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/CH6541968836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b7e529d6c0135e9515e3e709baa03ad9c5a2679c6d1f255456b069aed7f7a2. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/CH6541968837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c180a5ddf6fa05aac26794e35511571a063b4cdf5bbdf6ace3634f5e5919f5. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/CH6541968838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af9995688f9812ca6c1028a9c4c484f0d4fe23f823bf54a5dd786d5ebebaa1d. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/CH6541968839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793f5423f149e54ff09374922f95d0d45b609fc9a4063bfcee38e657f711b117. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CH6541968840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87cdaba4543a89e055eb300597bad5e76245257b9eb68f46f4b3ff5ab28bd6f. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/CH6542053210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5d4509d7eef593d45cc91fd766c6bccae5543d69b08d25299ba61184d75999. 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/CH6542053209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887f00bf3ea3f77d907e8c68bdc70a0916ce98f27978796dcc20e7d718c7c3ee. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/CH6542053208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb6beb7b65ed21232e723610767963688212f2af1af102541717fa639ff7850. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/CH6542053207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbf420bf92d1d6903aad017d2ec5de018e3dfb60bb0d1f5ec30776e48fdd6aa. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CH6542053206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338ece5e564c5fbc696d43e7a7ed36a086efc2a84f7aea1ae8604e372bedb0ed. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CH6542053205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b60a2083740c200e39f064f782cd5ba55a3cada7ea343d47ce50198883ac8c. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/CH6542053204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac4b7ce8612404477f7ab85d32753c90031785f10641b4b47b159fd3b80fca6. 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/CH6542053187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60c73cf085f49459d3b8604abdf296b8b96f61147d0135b9dcfc3b7789769b7. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CH6542053171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22185ef75cb49decb9665ae49e714045aea80e0c41138e1d9df7963f2562a2bc. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBLV61916575.