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 0xd0fceee954d838cb9988dd53b92348ab1aac88183d42b2be934813f4c74bd929. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/94e99392-5195-4097-8610-c96b7511433e.json and https://artists.proofprofile.net/proofs/artist/94e99392-5195-4097-8610-c96b7511433e.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 0xa02739eb2ae736639262f39f7621ba3c560dcc92d9d90fe061f5c12eb9ecd978. 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/BRT0O1400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29c56c4fb0524c09b2c45c792f53b186bf5645f90c61743de2826228795b6a1. 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/BRT0O1400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b706e1949973d6e815421b21d0184c0952bd578c478ca63efd2bdce20e0f1a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BRT0O1400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a16d10890f0a77fa8e22e91e9a3fda77037c709f5c773b56aeacafaa071331. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRT0O1400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93438a944d566512aa171725dd62c6cc1627b2f295bbdc6f30456500bad97293. 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/BRT0O1400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce05b4272574867e2495c441eb2a3c65b2f3c502e7ba4fd552a344d303033a7a. 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/BRT0O1400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887898637b22eb05eede2558ef2e0522d8117f69bd091b74d5d99743c44aca6d. 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/BRT0O1400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe026c5b1eea3f29e1a9052964781675a4648dfddbdf7e1d92933dbb7346792df. 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/BRT0O1400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1a3b3b5180709abdeb72728f93d53cf042abf7e4aa41f94fd9dcb0853a2ab4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BRT0O1200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43844071747f9a73a61a9eeed33c2aa1096b66b351fdc94490a79364cc6297f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRT0O1400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7614a89d8e5193a686fa53ce5b03229fd30e0e05b7c2bf5839f32a3cac25e3cd. 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/BRT0O1400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3e869d990f7ba42b9d976e00700faae3fb72f29f1ab03565ab35431ef4b2a1. 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/BRT0O1400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01eddd1fa750c995a537f3962544c1f1dcdd680da95ee058bfde04d737d7e316. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRT0O1400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93f008ad5c23e757b3567e13120c697fb5da15ecbfa229827f4a7b65246648c. 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/BRT0O1400009.
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 0x2adb1023d66e0145091feec83e1b56aef94da1333f88b36849e83fb91106f784. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:27:13Z), 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/BRT0O1400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfeb51c61d105db5f815409b7eed03ed09cf9cfc8bc09368766bfb8420596791. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRT0O1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b00a0110ef31a4212fd44a5e02777c013bae436905d549844b940cc4f39dfd. 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/BRT0O1600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9a6a8076d93cab0bddc3df79ae697d10cca432d08ef6e20055336d47fdeebd. 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/BRT0O1600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee535208d89054180863dd6702a964c9d8aad5ac55b8534976c997bbd3bc712. 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/BRT0O1600001.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3080024290f23a0661161dbe802452c9a3394261de107bed7377c4c2a10ede7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USL4Q2009299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35407d286a86cccdea5fc02a5036cd3360bde9cc5540fc642827a7bc00977028. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USL4Q2009300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3b53ba53137f2c9f878e783209ae2a2c663a39190119ad2d09474730550ec8. 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/USL4Q2009301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8fb429f3c1ab6c4f081214027d3ca79546212c137ae2918105104a5a2d4b51. 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/USL4Q2009302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f71c17b8d55f0909c85404f546052dae291190f35e5846492b36ff40ae4d917. 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/USL4Q2009303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3bfda79afc3ec299823409eb718acfffec127be3c2fabec7c8d562919ca00da. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USL4Q2009304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8a02e22591d403abd8335960945684056e416930044af7656511a28f98b9f0. 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/USL4Q2009305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7b198846c0c98dcb0968b5908541214eaf796b8d2c7a1a9f8b99efec884018. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USL4Q2009306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64d4884ba3512be9c59f2fd3d5523a3964b54d2308371e1a8103a0edeaa0538. 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/USL4Q2009307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c940252dceb2a98b77088b57d4c8e477655106c86b08d57ae4627b1d1063757. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USL4Q2009308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0bb506fe6da9607ba6791c0b3fe6567c732db8b7ae429c8b144806f77ed0647. 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/USL4Q2007866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e3853ab24f30a065f4e461150bbfd04ad68bc056bef0aefeee305cf3539dbc. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/USL4Q2007858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c7b9bc644aa22c43057054eda2e6a84fe3d3d2d4f204dd026c782d72a10338. 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/BRT0O1100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728fc1b2d72e60a9073e3a5db02ee73b32a51f92b79e16265b6f125689c4e252. 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/BRT0O1100010.