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 0x04eeaf4a9da9605b948a50e3888f10b957e8c30ed26d6ce8aa95ac2fd463675d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f474dc3-5351-426b-bd38-e3e0edbb9027.json and https://artists.proofprofile.net/proofs/artist/8f474dc3-5351-426b-bd38-e3e0edbb9027.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 0xd58fa864b3b31dfa5ca3905e909f37cde452263616a3d3778e4a8422b58e7d03. 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/QZCE61846214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2058dabeb1005367d906d967957ed196aa990598f00c539850031d595d8dc7c. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZCE61846215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0913ec2fe3c1478590adc1121762adbebc29f6234b53916490b1f10ef0631508. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZCE61846211.
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 0x87c28920144bff99121e5b3d6acec7adf86267270c1e4eeebbadd3286e7a690c. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZCE61846212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564283e829151aa90d62de17e1400be7a4594449f34096de6f1ef8b7c1a834d3. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QZCE61846217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20dbe14554edba48136acb772f0f576cc03811fbb9f6b3ab9e1adf20cc8585c. 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/QZCE61846219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b353df8e478596a6e9912a0d260489a7365e8e69b307e8abe73f39ab0d1a81. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZCE61846220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe161bb7c04e237a29e102f562c2a5b6fcbe8b2803d8adddcc0b34048c46e9243. 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/USHM21175613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7460292159c2c70a02a7f0fa2b451de04cac3e274be467b63534bb175030abd6. 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/USHM21175614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2469a2e86a4fa194d097d008ed961a271d2ae659903b98c613f9480daeac69be. 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/USHM21175615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f06b76fbe7d4b4ce6164e0f9301158126b3876eb5dc904e9c8bb1a7eda3dfcf. 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/USHM21175618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0911b0e4141cec12a5d512224fee8b9edadef2daac0d204a9d70bd6e3d8817. 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/USHM21175622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0607b49aaa73d2375fa74162b46610cf2040d4887d477d1b786cac8dedcc2878. 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/USHM21175611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf35cf446ec2bfa800db296a12cf0c8d05106f764ca02c11ae76ca55e20f55c. 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/USHM21175612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a5c87b4ed8ac59ef3fcd6e35bded7d6dd9ac37ca4e6605b598359eac5263c4. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USHM21175619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1c8c7ed6cb5d945d966b293dc56bb39006664e02416dec8493bfb3b093d670. 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/USHM21170643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b543c694b1df47d1de9be64c8b7e659276b57902871caf3c7c83da9583ecfc1. 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/USHM21170647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b7c384f0b298982cde5c0a4d4c09f528a1f2b4a94cb54b33084a04a59bb193. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USHM21170648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1623ca5c7051e741ae56265e3ee35c48afbc790becb93aa2c3ab70e79f2d74. 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/USHM21170653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44dd746de92410cdd85c5f86abf1393716c7e1a40fdcd674c1b4282a272d789e. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/USHM21170649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a17d830819d45582ba39013def71a43a85fcdf75d57f4edaff0788c869b932. 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/USHM21170644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3732f93e3f0588ac1b589d647a5a79479fea1e6f56d1925f96f1392ca9090ac. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USHM21170645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc282e48b21a4589e19ed2fa113ef1f04aa0b3ac9f7ce18ae40fd29e12cfd003a. 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/USHM21170646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2d815b812b4abcf7ce656948a61e13455205f9b220b3ce30bc71e0d7707787. 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/USHM21170650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b05710e8e514bd2388de027bfde0390c14e7f344b84805feb8b5760e0d7036. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USHM21170651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663d628d37528a00e3a64821b98a4fd058932219cb66587c68a6e1190828b84a. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/USHM21170652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f399073c97b48116ed49a048b37148cdcc121e000dd5bb58b1c9711fc86b12. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USHM21170654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd07f1ad011ad6c9e402c4a7b22bc6378040efb715b23d5294e37aad5fe2a1a. 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/USHM21185673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db112b7cfa615d777a9afdca14a288866ab4365c5038186e48a03c6c69e736e. 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/USHM21185674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca170e5da9b1c0cfadfa3e39866253c7b9bfce416c3291851b8a5c772c5ea5a. 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/USHM21185675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35bd79aa73db936495abab610837cb3c96666302b2d84d07a80ea2d328b4f76. 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/USHM21185677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd030373daeb249f5ef1a1a016387a6d5c990776264329f72086ecb159c82de8f. 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/USHM21185678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69914ae92f900386e47105049f800b8c66022a7203d6d8264b003013395822a5. 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/USHM21185680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258df12bab03442a5e93f12e41d586656874f2cda3a9bd685692f137900321e9. 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/USHM21185683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b848a48bb76735e5e7b4bc2bd8011defa3c11fca0fb78b0fee868483df856c. 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/USHM21185672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf9debb0502f64c0b2b1519d21a5f0c6d1e7ae8463717f290c4919f38b36f75. 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/USHM21185676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46cb7b05a2e3dcb0a2e4d5442dcf1be87466c3792b950b129bd08fbc426fe1a. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/USHM21185679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57baeaf9cd74da74d4bc64093a0285f8bdc500e310c7556c79f78bb54217699a. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/USHM21185681.