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 0xc7cc591f26f01d125d0faab8e5d1710719bdbac292d353e00323b1ca498f96c2. 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/d6d6beec-5dde-4d5a-bc97-fd5d05b55c6e.json and https://artists.proofprofile.net/proofs/artist/d6d6beec-5dde-4d5a-bc97-fd5d05b55c6e.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 0x6fefc0da3d98f4bc8726039eed914d239f299610b37b94dcaab187b645affcaf. 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/TCAEG1994113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1b732263168727cb4f9ef6d91bfa627a06ae17ded705287c1c174dc5b93c85. 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/TCAEG1994117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e8167d715438139526222f5fa54994c397159e97b2fa9a454a6e5e5ec99d17. 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/TCAEG1994119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568b958e62f7caf65e54778729d5374f63504f2e5dfb720130987c28a9b95dbc. 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/TCAEG1994124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e268049d9445ce86459764fe6e3234f560428e29ba40c1e4c53d1c8a9b44a4. 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/TCAEG1994135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b2cacc5a9f1937e24636b4e6430878bd0f2e300c8f71698f7c66148348151b. 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/TCAEG1994140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6563958689400fc44b585ff1542a41c79ddc6baee085152a44e4a2ccd7559f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TCAEG1993372.
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 0x8f1c7a2c8bd6792914de18974e947022cf1d478698253aaac8ca8865d4f28334. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/TCAEG1994120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d5d39cf271265b2ae726daf9bd52d82b9e0e5f785d8998c357c0577e475dd3. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/TCAEG1994132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59cef166d1aea4269cd4b0f86f770da9b76fef7428a20817bd39667ac9b67f17. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TCAEG1994141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b149de476d823f7c70910bf2a4e98213021f86af75aaea9d0c596c8ec31b2c. 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/TCADD1718781.
Attenchun (feat. Freddie Bish & Melodownz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7796afe6a3af0d42f73114d29a57fbacd7f195f4c45e701d0991cc3eb9f76b72. 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/TCADD1718784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e142df394d96df15058f490be207306d72da77377a2cc224d4ecdfda7cf916. 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/TCADD1718785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab459971c414b4895458dc9dd4b1a89326f7b355eacaf537a6fc0a14822d6d7. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/TCADD1718763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336d073c1142f7a8c77d94dfd5e1d6e63196d9d55c7f483eec2a488249244494. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/TCADD1718769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8531be1f42e25e2582a6c8d42d825d5674d134f15b4f1e0251f48d6115f100fe. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/TCADD1718774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa886ae4379a737ebc5d3edf23c4ad0e4cb0a73ed30e7902ff657082d4353a195. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/TCADD1718783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3cc37e5665569f1213cbb8653f719f9d5af27a40955971ef20afce62edc0a80. 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/TCACJ1595228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84afa5fe05d19214959f4acf074dc0287ae76397dff16dfb63d9996834cfdec5. 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/TCACJ1595231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1f75a9dc524c38f5f9868bea502a1fa98bdffc8e7c16d853360509e738b3f8. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/TCACJ1595226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da4f3e98579c7d7b284565cecc71ac1efa02d98fc08c6cea59013f8322442f3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TCADZ1869088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2b78e7c54a0cd943b4de0a8c99502719542f4a464b68f80a5c39483d64587f. 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/TCADZ1869093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284ad9131aa63e60bf02f143d916e6f842c27475d53f6463086ff7dc35af1bf3. 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/TCADW1812744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190d1d1eb6b30d527d2887920efa5cd4d58d79e13f3aa2895d5ee260449e184f. 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/TCADY1838482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5096b03d602f4cb9187817848111d7e2dfd82fd6d812a291032508a50530a6e8. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TCADY1838477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05194a20236fcd38846e79e17bdcfe8f2eda99ab97e65125e623da4fc604ec13. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/TCADY1838481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c4205c31acad95cda43988e8c393bfcf920538bc901ca2bc9e1957760fc104. 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/TCADQ1835796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ecc75a405241fe6db504360bd430ceaa99350d5b7caf5ad709af8cf4dde42c5. 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/TCADH1791146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e07370a5ff9cb1e45e986f777236546836c551e660bb6bf043c092bdb2e461f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCADQ1835712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dbb0732f376c23168444d45080308d8818dbed493b1e8ae0c0e3251543e2adb. 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/NZBY02300020.