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 0x3bde5a271ac30e2d9eba4b36c3ab259aa0da17269a7953a018a5e7f0254a2033. 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/6d1881e5-1701-489d-8e8f-4017dccc5af2.json and https://artists.proofprofile.net/proofs/artist/6d1881e5-1701-489d-8e8f-4017dccc5af2.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 0x68ebc0eafae02cdc16c4298dd7f0d32cc281a0755da2ea5f77f2931010f4c1c7. 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/RUB421307458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf743e8259ec587d355572ff9d7ca2c24ecb2d66b0c9d05eda6a97c386a4d9679. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/RUB421307459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb88cd5becfaaf04c06b90660f6be4afe9ad0e21d0bb2da6ce6a2051b8972907. 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/RUB421307460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c81d3e1c782842349ef1c04611ce0cd1b7a92efa4c4cd3c51b91bda9056440c. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/RUB421307461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437a321739eb4f36d970d71f6f6f6f62638552f908777bf8304b053c9373693f. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/RUB421307463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3301186e63c5aa5084ac5a4851f3e2e649eda84bd8bdc0e5ebc66d49bd561dfa. 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/RUB421307464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7aba7707b4e97ac8769b016b0ac4b7bceb6258618903103c43a8b7d287debf9. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/RUB421307467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6afb6dfce3b8563bd9f0aa2f8f2f7525f5bee4275f3980815672312bb96e1b3a. 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/RUB421307466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f5670cab71e095fdc77d9172ca4d20084516ffaf077ee885eea7426fc0e35a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/RUB421600525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842f7a2b1e2115e25f1d8358e9df45887e12a4d252bef356a461ee7ecf5c42d8. 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/RUB421600526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd72c7f19d9e122b892dd731b6529b82a3e1496458b619d71b9f00865fecf29. 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/RUB421600528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ebc0eafae02cdc16c4298dd7f0d32cc281a0755da2ea5f77f2931010f4c1c7. 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/RUB421307458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea8f0451749e9effa634cc83212b4213f9f3b8db310f87d2071da1c6fda7cb3. 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/RUB421600529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0934c109ec0f626fdeb4e4aeab59d7ef15f85a8030c53518c5eb31275378fd7. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/RUB421600530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5144dff17270448771015b4850e20dff44056accac7ea3bfde44eb9a354307c1. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/RUB421700131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230eefa9224bbcba489c19cfafc3aca5f94146ae05eae3bba75674461175c557. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/RUA1D1712956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8511548d304b261c1b03ad97215f6b429774b0898b5b23211b1c021c44859d3c. 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/RUA1D1712960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b9ab2bff0fc8d491e76ea0aafee3017212d1c072bcfbf82aedf87ab330e65d. 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/RUA1D1712954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b9ab2bff0fc8d491e76ea0aafee3017212d1c072bcfbf82aedf87ab330e65d. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/RUA1D1712954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae67dea86442062e16629ada673a152c7688963d3930b68931986d5d14e7d5d0. 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/RUA1D1712958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff84d4e534d7e90e53d5e4d8204befa6a0f756717b11d5345d94c4c8803879ae. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/RUA582100725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5c63ddba919b458802ab84421c49e871502ef4d603d13e04a175d89e241bbf. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/RUA582106320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2367d7ddebed0f1bd390bb7e4c67f0459147d1fc3333b616193a0f3cafb11e. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/RUAGV2404057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90dadbeeadd638413cff83853d3bd1a2611f27eb329b2a7803af4715695543e2. 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/RUAGV2407321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae03f723f68ca64eca1257ae31e851d57daeae9f5640360de5d3c3e80aeee5aa. 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/RUAGV2403841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46e7afb645320dc1083042e2dd841b8fc1934958fdb02325a2bb696233d7272. 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/RUAGV2302594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba74c82244d61ad253e518c050e14eb8aee8ecd37fd2b4008e07d42f8ae3f2c7. 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/RUAGV2410370.