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 0x5a147838db14c1f984399bb1c45ce092aec7d3d391752b0949e2eec09be10fa3. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0b32ec3d-6eef-448f-808f-eac1e5c272b9.json and https://artists.proofprofile.net/proofs/artist/0b32ec3d-6eef-448f-808f-eac1e5c272b9.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 0x84a3b46fd440d8077e24f2abfdb6de866046bffd8668cbb107979fd8861dae5b. 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/JPZ922404429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1e6eb0a9eb120eeafe40539624040154964a9f77b063fa2770a2e20795e8ff. 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/JPZ922404431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd08261fbe252e7a985e3e30255f5c5f9564c81a99a384c8e0f286a4c37cc0c8. 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/JPZ922404434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d40209585f1eb867d83915db8621f5bed16059fdbee571dc2acf141ddbce56. 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/JPZ922404435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb200d82067cdc01a854ccfcb1feb067ab2b52a72d69454c0817a5178e55c8c. 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/JPZ922404436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6893445c4793b9cba9968008d3c1b1205a8a6fc35a834a28b8015e3593e2098c. 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/JPZ922404438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b6b5998440d212adb0cd9f8abc78dd467006660321bec3acdb2dc483b3c82d. 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/JPZ922404430.
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 0x7713c9b6fba99bf7fe16d98e360d84a2504ae6b1f623d60a2eac180d1ad2f8c1. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/JPZ922404432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f2f232c9b19ad6f35f17a7c33bd10387feab964844f7b5f76a3fe39c7f4c3b. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/JPZ922404433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c5823f73463eed9c8f1dc67504c66313de0f179926feeb4d6e2abb28294e9c. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/JPZ922404437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802fc032de88a2d44c43c45bdc6853fd59ad4a2fc37d1e01a08717c55a8fa2bc. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/JPZ922404439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24a35342cdd135de81efa90c1de7db5146ed2c4cd7814d195a2e1d2892a039f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPZ921815973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8575ae84a0638de1fde5dcd561c194eaf2c83edc1451d0319339017074189f81. 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/JPZ921815974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe249b1865fb0678c201fde3612cc5ce816a75a6dad4c40636bf20cc50c36eb0f. 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/JPZ921815975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb51d30bab97f52736cc43be5ceb4c11c734cf925d4cdad35d5a9edaad4dbabf. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/JPZ921815978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87a894e7cdf01198a1650162824de190a7c086da4e0bb6c67da175b0cdfd199. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/JPZ921815976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ec88bf9319bedb42e67d71edcbf27bbaf03b9c4feaaffc9cbee3d4ace48d6f. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/JPZ921815977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f67bb476e06f8546cc30c3e4490cf8afa067fb2ee4fd53f15536a19035ac13. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/JPZ921815979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad20fc37f9297ed3a693df9fc8916dbc1023dc4cde580c8a6ee5f2cac8f45081. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPZ922409571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec36d0e5920649bdf435f9e5d92051aa43e9b11acef88e89c15801c4c68c483. 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/JPZ922409572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc0cd58930acd6c747c9ea04c8474a6c90816c8cccc0b669a5d5829c95d54ca. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/JPZ922409573.