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 0x93a8aabf14d94471ddbbb318e94cf29abaf7d5f2ac8697e99cdd610f2b602be8. 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/0f401d81-6444-4638-8a9c-f69dc9ff6261.json and https://artists.proofprofile.net/proofs/artist/0f401d81-6444-4638-8a9c-f69dc9ff6261.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 0xdc9240f2a8b1ecfe8b337aeb407db55c77b9ed58ed73c95268bde0b714d86dac. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USTME1850209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020e07e2785de6dcba6bbd37e2b5f8d4476a6f8cd96cad76794429fd10a42d15. 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/USTME1850210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4f0d859abe316ddbd7770979ccab8f9f567632b20c1b442b755006651acda4. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/USTME1850211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685b8290f7fba45952b94ab38ca8aa33cf948c001edb1e24b6c7d9a6d9678c22. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USTME1850212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a29375a0b5124bf2146f09f20162e1a55832ab946ab21390139af6942f1b539. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USTME1850213.
(Turn out the Light And) Love Me Tonight
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdcbcc6c2b07060819d1c02c4bb6f05c0dd2bd9dbb15f1a80af1352a7791b6b5. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/USTME1850214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be143a79b8178125ee093e68e1fa89cf7c0dda764a68db4a6b442dd7afd051c. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/USTME1850215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566724f1bf8fd979361eaba0320a47ba3338e3869d98ee9886488c7b0d7062db. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USTME1850216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a750ed041d4a17b3c862b95555d8f2f3195fff044d6426aff0c88e7cf0f870. 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/QZWDD2352158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34042c95022d76f89c401226050c5372827f209e7643a405ee071d6c8ec4a6d2. 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/QZWDD2352207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc40504875ffe1168a1df9fde4b418d0ba2c3e19e911a6d542b319d9959646ff. 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/QZWDD2352553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28e7aa8495e1935bd87bfdd45cf83f2547bc700f60e093be478c45a09daa5f4. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZWDD2352221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34042c95022d76f89c401226050c5372827f209e7643a405ee071d6c8ec4a6d2. 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/QZWDD2352207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2754c1a64ccaed97890ac0c194277368e911105192c32eacd08512d351900a4c. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USLZJ2294976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efd9fb08f4725b59ac93855b29a73bf7e2f9b279f3f13828aea43b5015e7751. 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/USLZJ2278538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68df3d94e1a71af190ff72b88eacc301f8669eb06181f7d28c2b0377174a81a4. 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/USLZJ2294617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec0990943ecd97710bd12d2284877e58271c786565ba92d6055a68349757342. 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/USLZJ2294982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77204a6f466307e1687d54485fcfda3bc270fb853f77fc6e255776618dc91a1a. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/USLZJ2294988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f6c55bbbc2832e5dc16dac30ce70e62665e2d9de45d0fb95588abc41668a23. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/USLZJ2294972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ffe3c1a09de8fd223c83e8152061f475894a808e43a5e55f3d7e98ce97af40f. 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/USLZJ2141788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d9b6bd8635baad8e5ebeffa6ff3efb8e4d02b848f4780b165f32ef3a9be955. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/USLZJ2141844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ddfd363bcb1919d6a48a660a75b3b5cb34c848734686dc8c4693cf86be6a82a. 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/USLZJ2141813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a15a64e161ef2ca7b1bb668e0e4a348e89818cf1c3600cfb486bc9f0f0eddd0. 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/USLZJ2141650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07488ccad63d1301a48630879d8a0971661ddb81215a57401945d6d6cea24178. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USLZJ2141848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d28ede9b845f821da3fbc93e4a66a73d3a8bfc292c420b4d0876c6a27b156c. 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/USLZJ2141837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ffe3c1a09de8fd223c83e8152061f475894a808e43a5e55f3d7e98ce97af40f. 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/USLZJ2141788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9240f2a8b1ecfe8b337aeb407db55c77b9ed58ed73c95268bde0b714d86dac. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/USTME1850209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aaf79d959bb328aafaa7725b18e9570ab25260b3b8725eb924ff5d42a02b9fd. 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/USLZJ2104498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1152846f3fb34a295e780bf7e5f01c5f9880ad62af5929c6493299b51bb72c93. 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/USLZJ2149446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a30c04111bc6b9626820d15937292cdf50cb8b8711726bb713e8c5ec0c8a2b. 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/USLZJ2149502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf909f594a40da70977e3faff174ff7266dde6bac9731275ebbff5f926131144. 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/USLZJ2149526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98bd03a8dee2ceef22180c0299498247f31b9f425f8f3c2cf2c6e1e56af3426. 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/USLZJ2149529.