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 0xbe9aded958c65c033739147920bccf1faf8ed7fccc423fdf9655ff3a74b1fee3. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e73b9d30-d0a5-4d37-92ee-d94a2f014c7f.json and https://artists.proofprofile.net/proofs/artist/e73b9d30-d0a5-4d37-92ee-d94a2f014c7f.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 0x121695d540f49ff012aa6efdcc03a9f1b07294f5fec8d3919e23d40e5de022f1. 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/FR9W11009636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16ad576caa5adf9d09a5294a77beeae841bd18dfb2e26700c9058b999904338. 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/FR9W11009637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7d1ac7fb37badc2d66185594d8274ee218a7d2cf98cdcf1c675d34ed27604d. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/FR9W11009638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9a8de26302bed565d94c1a791403e29592333d87d37585564cc32d7d4e01b4. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:00:54Z), 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/FR9W11009639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d6289b2b91f485c1061880372278837cd55fab047c73e0eeb24fa9af152453. 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/FR9W11009640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410ee5e36659a53efee8938e0480f1a158d3bf97a02c29fcd545dc96a910a2da. 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/FR9W11009641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84522264dd3c5b5cab7f1c8f1da11a928c927f2bd0620101af8bea1308f5ab51. 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/FR9W11009642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd505c953c2feeb0a25b4a9af063138b35bb38dbc1d40ae0cdda620d7d5753d5. 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/FR9W11009643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3794cb7508e5033fc03dfd12492d44ed2928045c5d79e17de59232b44049ce2a. 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/FR9W11009644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2406651b30d59674800e187f1bd2da26b5e13dce57ffc490bec6b89e888cdf. 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/FR9W11009645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33dfa95cda5c71b36f2e22b73e5e1e18982f0e89ea3770cc3a04aff1e38b87cd. 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/FR9W11009647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d428b1c594fe9b23a454aa575fd39fdd83f02cc525faca17865b9d3456dcd9. 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/FR9W11009654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bfb8fe1086705a7314ce8b54db1f50c565fd0ffe786d193d37ee5781d8f3331. 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/FR9W11009655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4096e7c6bb281de7190fe7a3b6e086cd1fa06f814fefdbae5e09512f7d1893. 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/FR9W11009652.
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 0x4c039a0afe624ebfdfbb003b3938a6ec2ffda831fc57e723d9709b858ae68c69. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/FR9W11009646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a5107e48a0f48b1846ac43142ed33141f8be3e0a224fd95c1482089fed7be0. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/FR9W11009648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eda0d10fc744396d7dca8d93df344e4767b3a3bbebb136c6d3dd26ac0b4ee9a. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/FR9W11009649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91788f01597cf72db323e6ee0fe195bfae35a8270eb8133de478198a3da1576. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/FR9W11009650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd163cef87a8dd8f3eb26636ab6d4dfff87ea8d615c670ea6065349846bc9d33. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/FR9W11009651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a10c6f18bc44e2a788f37e561e077961ba7d7e9a94022e7f120678bd7b32ab. 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/FR9W11009653.