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 0x54ff2348307486bbb367859f9608b0a885652a7fd1cb095fa371f1a1aec831c9. 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/5ad647f9-8e90-4212-88fc-5e2458481c33.json and https://artists.proofprofile.net/proofs/artist/5ad647f9-8e90-4212-88fc-5e2458481c33.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 0x7d85edbd17e718ac7e1e7e1f47cf7fd4fdd8ea1871d5e9aa99220302032103a2. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/FR9W11815695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ca5b19c8169e3463eef5c5f20abe4aeb2ce38898dec3c2eb3a06f27955e6e8. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/FR9W11815697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17693ed000ca90becea7ce54071b28b5b71158a2e96b2c8d79756f999b28da40. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/FR9W11621450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981d70c0ece828b409e65d69088cc31ecf829524272c76be02e5981e596e341b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR9W11815693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26526d50ea83113ffc07aa5d4c5d69f1cd231de6bce0ecec2f317a5f235422f1. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/FR9W11815698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981d70c0ece828b409e65d69088cc31ecf829524272c76be02e5981e596e341b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR9W11815693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856f817a4d3fcb4ca5c875f45ebbfa43ea7616186bd8b40b4b177eb4f1d9df73. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/FR9W11621446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81b4751c5a40a94e7b188f56cf402d05d7e854ad7dcf2302a7103e34320d13a. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/FR9W11621448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613b65f61670e836032846d4745308dcd65d8fc1a0bfba417a88b9e1ee637cd0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR9W11815694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a27d61fc67fcab82e03a3bb0e06c30bd54f39573838183675bff9beacdb21c8. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/FR9W11621449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0814a1ca55ee090b4ef51cc190c5125dcca0b2068c4a323bc0399d063ff5c4af. 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/FR9W11621445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a0c852f82cd045fbe3d2c8f6eb22ea09f28263e87da7cc501b9a07159ec719. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/FR9W11922177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2c4384f7c9e1a4b43abd89e74c8328f5ec7546e8170e051f7e5b0fa6fac32a. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FR9W11923818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817df8ddd288454ab033e521fabc5211b274f3d7762bc6ae9caca09ca9c7a353. 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/FR9W11923823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f6293ee0d972f53628b5b66ba0a9a409cde204163f6bf1547a87a1c9a3234a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR9W11923825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51282b13383f9174a24c6014f79bda36b9eb1301c115418dfa4fb471b16da0e0. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/FR9W11923827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f327a47e3e0919267102b98772276ac0d645075e0392eeeea5479af2cadfe89. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/FRD0X2000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc413ef792771062885ba97ea1f3a3f135d295ba5fb129a607d9d0cb4666697a4. 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/FRD0X2000050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78779624da276c3868f29f3dfae5905c52164aada9fdf785dacaba0634d12a2. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/FRD0X2000080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896bdb64fa6a343fa65b6c2a3dd483dd9dcfc1c51f114be07191f1b121bad6b0. 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/FRD0X2000100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106eceeefc8a5455cd8ae98282070123786db1c7e96799b031de1db43e210952. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRD0X2000040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6399d99699ca7f2dfdc2635c03ed99836fa793826417f6e388dad392e5036e1d. 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/FRD0X2000130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b11fd2aae55f006cc9d5f190946989dc1c5d1b42c3f065fa21b09e98b016df. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FRD0X2000140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100bec1dd87c05766ca3ef7796efb184455beef2e43c6dcb5f42c1a24b72e279. 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/FRD0X2000150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f327a47e3e0919267102b98772276ac0d645075e0392eeeea5479af2cadfe89. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/FRD0X2000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9bd0e5c9e2779c4f68bc77c4a447ed1e221e1f543a13af124c36f0a39d7c6b. 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/FRD0X2000210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709fb13a166f5553dca82135f8c13dac22c43397a2146399fb6d0ede008c71c1. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FRD0X2000220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32df9665e8ae1e30f5b5729867c97075c96afa87e610b793183b8553c9030686. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/FRDOX2000240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c6ebb6d30baae1925838b35533af0a14ea6e8471cecdea4075dd92eeb033b5. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/FRD0X2200270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9eef7369e66c17b6039132a713deeb8a236f8ea872f6d6d78d21a34385f195. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/FRD0X2200280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb7dffc90247ddb88fb554ec77a6e3543ac172ddcd9c0ac416c0dfb8f6eb32a. 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/FRD0X2200370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c6ebb6d30baae1925838b35533af0a14ea6e8471cecdea4075dd92eeb033b5. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FRD0X2200270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c45a92ef73e466d7a47fddb8448154ec37591c8fee7071cc1882cad2e62049b. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/FRD0X2200310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418dc9712720da94abd7491fdc58ab8ffcd0df0ce46ef221836d3efc51eab67a. 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/FRD0X2200330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc58d8577aefac8d14019f920311ff6fbd43b2fd2f458af9d4b0d53a28429c3. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/FRD0X2200340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1071c3e7ff0ea992bce3ccd65c570420a9564364e8e0d60016abf5315525190. 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/FRD0X2200350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675ac9c8dd261cd07820580f27b9337861bcd162bf684dc8e6bca869b4018cf7. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/FRD0X2200360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a0d71dcb91602e23323622bec0859c7983459b41b5055189c315446688c9da. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/FRD0X2500540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3ab5c3054bcae0452a2bc1fd77d759b14a9fc55e69af8856ae827176258a6b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRZ052000432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f4a920e8621fa5c73ebcbfc8ce8a63a2a326c38f9a60eaeab6996ce1ef4bc6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR91X1902100.