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 0xa0a5d504bae97ec6b35b27d0fe7de9af11bf3158754391163159f06fb9799151. 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/edd05cbc-eabc-4a2b-a583-cdf09bc6c2a0.json and https://artists.proofprofile.net/proofs/artist/edd05cbc-eabc-4a2b-a583-cdf09bc6c2a0.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 0x2e6121e09757575363a09f890013fb2e94d6a71bf2c93bb00e45a9106068d8da. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FIPST9700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4c2f2012ad23342c5677d48bc4d920969ee6731d90fd958b2925aa6f205d43. 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/FIPST9700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5a2cc9552387d2596f8e740a898a057fb2817559d417db8ad2fcaab68838dd. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/FIPST9700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e8699ed69ae66dd0b0f2aefe423b7ced50952f07cbb41b940e88120de10cf3. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/FIPFP0200109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7b3153c3ed3fb2a0cc76eaa252af355a0f50a26f7e5f8506dd106f2bddb0f0. 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/FIPFP0200115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c6d1d651971ab0981afd10ba817ce0cea239191536e2837b4cf9a5e0b7d497. 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/FIFLF8600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc751813dc9bbbd67a8ca23fcd65b6a597ac7d307edb334ab5f17724006900a. 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/FIFLF8600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3bafbca96211cdb56549fe3cd398bcf72a475c8e6c777828e66cba285a7aae. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/FIFLF8600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21f63ef3f9ecdd1f2447592d62e53e57aa178be6faf42b09d9e618d90073fcb. 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/FIMTA0800069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2df26d947f3ae6e65b67e3a87cc3ac0a7c8fadfd98c7fd9036dcbb5e05334c6. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/FIMTA0800071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd847e5648e1a13a4d9b7add5b48056bd491df9424423e20f7f44ac444a6fb0a7. Chain 2 (Bitcoin): anchored in block 957647 (2026-07-12T03:57:41Z), 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/FIMTA0800021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a2258996c0bcf9e46e8a89aab9b34bd9a3433414e49b4d3dfcb9c62f06d7c3. 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/FIMTA0900073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02806c423faa2844f876a989ba5585d97600441f9f439fd49097a076d23190a0. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:32:59Z), 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/FIMTA0900076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4821fac5accd4d308225c2e3d81087905f17aa783f7a2b0e15cb45c056a852ce. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:10:51Z), 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/FIMTA0900082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e0c5f6a3fc249fbb61bb0f346bd3e60ff8f9fbfd8e4a942422b37cb10edfca. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:57:10Z), 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/FIFLF8600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29ce4edcc52bd0344d8439accd7bcafe8254edc26054840f38f6cb96d778db0. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:28:45Z), 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/FIPST9200901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388caca097d6aca083b33e439dd26a250f8e476f41c0050510ae648a72b9f8b1. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/FIPST9200902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5c07d972e98ea0c8b046ef9647f33959b41ce30f5d98b88ec55a6d6b999bd9. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/FIPST9201006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf265acf37dbe4a72f90fa521a93590e86ee912d31067cb079b2e8da697aaa2ec. 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/FIK3E1200059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8242bdf9dde0f39a657fe390aec467b4a12da93603f528d24ba61c433a894dc. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:20:23Z), 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/FIK3E1400126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3213f53a9161b476d56321f69822be2f63c82f35515cdfbbe039f28bb98dc834. 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/FIK3E1400127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb720a9d127b7ca026db33ae79dbe62b246e8755f4552626b475fec4530a06385. Chain 2 (Bitcoin): anchored in block 957647 (2026-07-12T03:57:41Z), 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/FIK3E1400128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452f8009ca2930c567a60e18daed0e4dae18904296a037c2b105b428032aa185. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FIK3E1400130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c27d5566621def48a9c6146ddd1871882a004b45dbc9fed06477f4c9c918538. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/FIK3E1400131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61ba9296b44ca44632083868fd4cc8e1edd741dd71049a98bd94bf8bde84100. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/FICON1600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78dece72cf531cbfe068de2354aba21b27c5f118c8784fc4bdcca34f13a29ae. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/FICON1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380f7e23fe5580f4556718ae236658d8f914b65b78d138e0ea1ed6cc9654ef5a. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FICON1600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ccd911b43846d5fc30cb54efe75d2e5848646c6f73af9836ece71c25e53a823. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/FICON1600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108de63658e90580687f0bd2d00e8d9a3af403d70557194df8daa90445ee9bf3. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:30:19Z), 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/FICON1600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0481c8f53ada01df255cd1c057f276213bd65c2c6eb1f7fd5b3f2710df0f44f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FICON1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace623a808d9f6dbd244fe02a0098e905ed2e46f9273ac57123084a6f9cf8aab. 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/FICON1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5814562e0fa96de55b4ded563f7b765dd78415f87b1108380f00e5c6a5617d9. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T16:58:28Z), 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/FICON1900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc8c0e105f0a5731ec0ed99e23239c180178f8ef761d8f552b41e79d80f3d9d. 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/FIFMF8400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57124a7844398b925204038845b2874cd93a1d4ada1e234956f7dd8bcb95462f. 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/FIFMF1226349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb9e7a0fe5506f8a3d248d2be63c43a715813e0755386717984820fe93fc120. 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/FIK3E1200061.