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 0x0cb6d580d17242b502f1e8aa9428b5563474dfeeb12f1c960e189ef53420b1b3. 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/8dba95df-ebfd-4dd4-9439-aadd1e6f1943.json and https://artists.proofprofile.net/proofs/artist/8dba95df-ebfd-4dd4-9439-aadd1e6f1943.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 0x9a46d41b1760db10dbbf51b9ab372ddd92bdde4bddf4f7c93970c21b5c283b7f. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZDFP1843800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f82eb475125a8a04fe084d4c61714294a8ab11e851c5ff79ff00db6b769e98. 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/QZK6H2393847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeebf074edced4fb60fcc315c78466f7f288efce1781c72476a3275b67dc70500. 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/QZK6H2393849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d69f873084e05c53c47d62787fc46e4bb5c5ca85eac529f88f1807b0afb148. 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/QZK6H2393850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eaf57153656c7e53b6b18fa3ae996eaad9d7075dedbacbd24c76ec202fad56c. 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/QZK6H2393852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15140bfe3f654cc7b46a6ce798f5041342f3b2bb8cf2cb6378145e8a502a0dfb. 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/QZK6H2393853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73ffefe9ca105aad17012cf915ac569bec690204b676481f31e80146ff4685f. 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/QZK6H2393854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2c258457c75dd8941dee3644be05e7dd21eb9d92a69333d51110492b6f6f40. 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/QZK6H2393855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8131208326c1d140d8cca214736ad6194b4ec137679989fd1f07cd6cba654e. 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/QZK6H2393856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908658b380f164a77b1ab33bc08d56baba12cd96ce0ea6a0d4e62a449bf776f0. 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/QZK6H2393857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412e7c629f3d5d45e378abfadefa50a2fcc80ad05e4a8b4d8aed6092b7e433a1. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZK6H2393848.
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 0x8b84fe0a109be850826dd067dfc4658e2e148e3dfb93a7e8305cfb7977419b16. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZK6H2393851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03ba3b31301e97b05c3fe0cd7262e8c38d6c896bc8ac43ec76453d9543c5dd0. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/QZK6H2393858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087db4462d2d266e9ca52d9a16de4f3a54900c07948b1267fa8df96cd5dbc1e8. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZTBA2314534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d72621701195e15eea39f93576b1118d6d6b91c70235c44c1f18ca6642514b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWFH2350073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527a65b8a97d739bc5081c544db7c372b4b3865909c8bf859275342f88782e06. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZES52429728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8117e40cd5c0084db859bf21c7fe01d5981c810196e8fffc3b6abd6faf39ab8d. 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/QZK6J2486682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a24f9c2fffb1db39411f8862f94d2a26d5f7f72f2630a9dbdea5c589eb3b0f1. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZK6J2486683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4422fb3f50965443a7482aa41702bada09271156ff4e3494bfa74ae00887447. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZK6J2486684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a54550c17ec11cda2c480c5e983726e60da510ab20710a1d5723cd3cd10393. 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/QZK6J2486685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6acfecaa71cbd8ddbc48105368f8991806bbbbdbc14a6fd6064e330257abcf50. 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/QZWFF2454319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445cfaed346cb00f05af6921f0a4b6ff5d32408a6fc641542c019cc7453bf6af. 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/QZWFF2454320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeebc3a50b83cebd959cb881772520025ac5e697b0ad9f6fac098846872bd5b83. 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/QZWFF2454321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96271adc9d046d691ad0857db8443019aeab4d62b8a011532efb8b5bc8548276. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZWFF2454322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c69181645ecc901aaabe130a3331a294ed12b5471339dc0a51857d6492dd79b. 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/QZWFV2466517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33a4f5be6014ced62e021a661d0d47ba9d1802854312806472721c5b6ba60bd. 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/QZWFV2466518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdea8b933611a05c6454b57beb4abbd9ed28d8ccb3481ed6a083f5df04c198b3. 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/QZWFV2466519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6caa50b26a1a5bf27eb38d62e2746ee07fb13c22b976e65612c0151829c3c51a. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZTAU2537389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b886050fb388111e56cab321a36682cc48cd6bc7f9f7a02acb2b14530d5396. 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/QZTB82208322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65d73496a5b6c113ca1aaad41a36be6e9a9fc954a4e84288445bce53ee17e65. 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/QZTB42360376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba67564b0266dfc70b528d7aa6a525f5267512c5e011471d97a70abda7ddd18. 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/AUBEC2520898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595dd4fa4b9aff2d153c6beda288ca7f90770a8b7253c0792c9ba2c2226d93b8. 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/QZTB92228924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555fd621e1819f6e9ebdfe04350b0f63a5270e1a1f07d73c40889dd6ba81f923. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZES62274614.