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 0xa3ef7ee1c95fa383359d3b89687cc806ebafbae08cf1243bcb385c7403e70487. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ee95be8a-cbea-4b2b-aa03-dad4d4221a51.json and https://artists.proofprofile.net/proofs/artist/ee95be8a-cbea-4b2b-aa03-dad4d4221a51.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 0x4114065945e6b9ee7ed2bb4df77e5fe517c729567b3f146bbe4998cee092c24d. 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/RUA1D2006334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f537ed8d9e71277fbbcd965c2fc6d5ed41d21397f76574caf371dc07c988891. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/RUA1D2006346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96414c78cf0dab1e17d82971c135c4928fa544b29f215ec32639bfa5e3b0f31b. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/RUA1D2006352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0688be608ec63211218776e23b64aef22ddef7a2571d05d1cb62311638b60824. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/RUA1D2006358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7607bdcd3822da6b80f9a2c5e52803a3f3f4d7a5e90a11fa993f284312c637a5. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/RUA1D2006360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6298ffee96262700eb0b13642672e98a6005c7d8e976d43deafa3c216eda8b. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/RUA1D2006311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5111dfd257ba17efcd6e75be8a3cbf5be1f364c11bdf779f0c7d9be0a9d6ed. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/RUA1D2006315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeeacc7e5ec9f9fde50415300fb1c570083a7911281728fea1f1e0c7781fa03c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/RUA1D2007376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd685e1d762d59a670393b593fb54c7d65c9f43a0a673283d5c0b66e42f07b874. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/FRX282085854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a9bdfb060ea29d7abdf6ed019b15a3b55bbc8fdf2100602919c6516c044443. 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/FRX282085856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90624b4177278e24008baad56ff91bd507de4730c797bce87469008259968a6b. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/FRX282085858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb041a6f92af4415f91a83596d288ee3f7703d7972eee4b98d3fb04bf190ba9f. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/FR10S2153497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91430e70f4c2535c18899c35b50b4fee995bd18bb60ab293e225e841b3c4138d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR10S2153498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe209393e5a8ff17a727c0965ef67c443d249388a556add580a21565d376b5f6e. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/FR10S2153507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd588e4dcfe02df0d54b4285adfd89b6c6c11f9f5b736b516e1a46954a0e34ecd. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/FR10S2153508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d12dfef734dde53f669208afb9045dbf7b1b86bf58811ec14aa44bb2cccf1f. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QMFFM2000686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadaee9c3a338a476b94c2ce5f71d731ddbaf07d4834dc70035a3c76844983f91. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/DGA062070676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b09d2a8868295a18edc28328fcdd91e485d42845b330f9d6ce3b400061febe. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/FRX762277550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff7deed5a6735edc0cec143476751dc98f6bcdbf03df3de940b702a7ee63177. Chain 2 (Bitcoin): anchored in block 957608 (2026-07-11T21:00:50Z), 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/DGA062371196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83fc13171a5e252511d217308680701b389eee1c3e8492d79335b2c8b304ff3. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/FRX762475239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41dae2abfc0b44f608b676594bfae3bd3245fb0841ad3b4b5cbd0f55259c2303. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/DGA0T2410598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d7e036eb8ea504d6e13e422a5b0ebe4a31b31e9fb084c90b8aaa4cd3bf64c6. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DGA0T2427180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7781138550e593b2024a3b4925de91045f5c1938c07a6f58cea4a1f2f3142906. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/FR10S2571823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35accbde53ca878e07da4b3c3529731abbece02b1395213b19df61ee776e79ff. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/FR10S2575064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0280200eb1f7fb66a6ebfa137404c88ef887180ea9c706b6248df5f4c6fb1f4b. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/FR59R2503232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17e7365ff47c6f71f2c717c0311521c5c1476d08a89cc2cff942a3fa6d0e20d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AEA2Z2553929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a9f6d6220200fe35c4ec8ab5ce87c255824ab638d4b3a5f0dc0f0ee121f328. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/AEA2Z2569102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa445e1a54089807e4800f8ee817ff39c29c27788416c8dc6145b6ef69d59d66b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AEA2Z2579775.