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 0x9e47e5e511b433520694ba6aaf4bf75b55170d3c290574ab9d4c23abd8849dfc. 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/7a62ef11-251d-4eeb-872e-dac62e0d4c62.json and https://artists.proofprofile.net/proofs/artist/7a62ef11-251d-4eeb-872e-dac62e0d4c62.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 0xec1085ea57d0abda05f4044d48df5f927d390390e6c8715a22df061c9185dd82. 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/QZHNC1964866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf014ef9909736998ba0949b052bf3a62c408437ba88efd17c789d6d4d06346f. 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/QZHNC1964867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce181014d23daa37118adc1ebabce68843af9649c3b14f63325ef7b2cc9d01d. 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/QZHNC1964868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef93325a9b37d482f1a6cbf2405959b36904f9a7d13778e61442c604aa89e95b. 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/QZHNC1964869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656d9e28e706e8387b11667006bd76123778149e00341009790d6af9b30e4791. 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/QZHNC1964870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9943353a241f0efddced0c93feec706512babc4f821418730ebf8f7197a722. 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/QZHNC1964871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5ccad173b25b1a02fd12819844761136bba9b03608f0d654a9a20f1e073818. 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/QZHNC1964872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7f79b476f766cb7d888e25e6da96c441b41d437e3e461bc5ae49d8f735d73a. 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/QZHNC1964873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081fe48f51fcd5a58df20ecf76fe417b977e4aefd8180a41cd9e9395a09f5e5b. 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/QZHNC1964874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90bbe65666fb96f13d96630861f0617275adf2b17873919604477c6c53753f98. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZK6F2177371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0b329c92193daeca0ec88dfc0491a97c100c09c66de2527f55905922d56194. 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/QZFZ72278742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeafa13df00dd14d229d1fe4db019090ae05c3595c45a99b28e8ff920459ad5a6. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZFZ72278743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b088b88e538982fec1166ff34f86db63b98e3c50fba7fe3c2b71e9ccd02070. 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/QZDA72174111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1c825bdd091291a9f40265107360b9a18c074d2636be76f4219fb1c62515f8. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QZFZ72278744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8e7368be233ead392a2b61a89db485ab1b09500bb727262992712dcc4d2c45. 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/QZPLR2147769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab53b5f5ee30d7869fa323b2d910eb169445dcd8141c52347a5312b89d1e0a2b. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QZFZ72278745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676322d5c51fdcd31e1e31be0d351accf725d1124180fc65a653dfa5d90e0a09. 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/QZFZ72278746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b1d055e8a9c64770222a1504bfed3ef7cd765a2b89cadb1625c6aa7a79bd21. 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/QZFZ72278747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d01e9b1429865bcb8bf1579884623867c7b7412e5c1ad3c0f7b488b0f3220b. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZTLA2493824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e7f6c3e0ad4e0e1d24410ce1f68748540d7606c21c18848ef31556c179a4ca. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZMEV2224119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9030ead243fd4cd0c8e7ebb1bd40c07456ef498893077c558071437b9ef8744d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USL4R1946823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3586b94fb33517e2e06a03b4567c739bac63f607b9372a22408e6127b07f29a7. 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/USL4R1946825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c36a1035b81efd3d21865685324064ea09cba836f46e96190a580131b791603. 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/USL4R1946829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8452f25d17b10a70316b81b99dac392a7bf87c53e36f296878f3a77c2dbf51d7. 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/QZPLS2400371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc979c73fa9a04d80aecc239ab51c91de1977992162ac3659785e3005d1d81c6a. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USCGJ2239451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8b680c4e9cd61f211581e7ab1f5d005ac212439ec37d205ab6bcbdac2ff22d. 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/USHM92081673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a87ef4053c33e3bbbfd8b937f864e56c5ed4e028507f336fa5ce3fd86dd70ab. 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/USHM21961069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f78b68d06c174a577735404c21d4b2efd93e14857c2f7047e9fa27ec053b47. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USCGJ1930904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd858abc264807199b132eeebed168d2e0bc6fe95a22775fead70971e93de8c. 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/USCGH1872819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ad9f51956c7d384db71c4078040fec92e202c7e08354075eb920c9a0045286. 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/QZMEV2232109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d517bd485cee2ef3530f39945ed0f994663ed5d274e753fb28ae9f81a06e1f4. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZMEV2224120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc87b849d3e0cf1a05260bc767f62bc3a5750a1dfddecfa6e441f0a4ad59ddde. 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/QZMEV2232110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e7f6c3e0ad4e0e1d24410ce1f68748540d7606c21c18848ef31556c179a4ca. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZMEV2224119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0a0268ccb4c065a3c531ee716fab80829fe6a8aba025bbbacb4b54aae4f840. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZMEV2232111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2ccfab9ed542a06ff9cbb32d03094b31d9800103c5452295e20cce03e9351b. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZMEV2232112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16c3a00bff522b5e6a2b964841c062a2642f5236e16d37f2b40dc1fe18cc58d. 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/QZMEV2232113.