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 0xd30924259cafc985da89fd266f4550a1bca2c3948f38e38cf06bf261f9e3b08b. 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/59f64c8c-8c39-4334-b532-f36d92a449c9.json and https://artists.proofprofile.net/proofs/artist/59f64c8c-8c39-4334-b532-f36d92a449c9.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 0x5f05214c1347f4524fd6e3a6f4f2ea5b198feed30fd4588b27ef51362b3430ca. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:17:28Z), 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/QZGLS2241716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4454cf2e182ccd98da7d1675a788bf425d57ec8207c18fa3119ffdfc78eddc1d. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/US7VG2464918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeed6229d38625ccaff5e74c927649c8c0ed02bc7928b044d665df3262082402. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/US7VG2464919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b1dcc4831e0cb1f2b4c19e1cbaadddbdd8a5d46c7947f2bc0664340c7ce8b8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US7VG2464921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74989563631038b4f7e76b55b07b2dd57eb345496d723c6f8cd14ed8c551e771. 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/US7VG2464923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af10731b0982d91c479d9dcd5c0c65f46874bb8513f3c79b03761951fd27795. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/US7VG2464924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d3bb1d13f880b70c0ac215fbd381581efb1bbfb37443d6d028a09e375bad6b. 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/US7VG2464925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889cd3446eb383c4674605cc990dc876ded957c91733e394e533a9dcbf897111. 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/QZW9L2362933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca550c88dedc8327a81297f7772c4782ae1f2b2eba142bc8df671b25864a325. 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/US7VG2464926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5935ed910639064966fc0120e53cab354d5e25c44338610723f20f402a7e79. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/US7VG2464928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9909f46205d174e1e54168f792c26afc1883c3aa053c49ba045eeabb37cb1803. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:34:12Z), 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/US7VG2464929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaefc4897c1d1035aff8b447175be8d5c60d1d647d5d43d18359c934469052441. 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/US7VG2464917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1907826e70c1f1742f86a9abf165264e63926ed7bdd75b11a0616044a000ae4f. 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/BK1HM2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386cfe562d7942606d258ecc71b3b2f51f1135d8937570fcd8c84a56253402a9. 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/BC8Y92400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa00fc0459447e0cf11a87b770d213526343841d96da896f1d1c1ba14b2bca99. 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/BK1E32500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11fcec3dd2632a00e3a991c8fe04e7bfafbef596a3ab34da2f41dc2aea7d6f3b. 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/QZGLM2589641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e61d7af28f61bb4c8ad2a09c1ed88eb52f1f04360675aeb12f86546dcfbedb. 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/BC8Y92400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748f704f1b3c72dc8eecd1dbe4f7c18ab44c6f4a75de32b6c87f6034c3e8cbfd. 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/BC8Y92400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd634063ce30319b2d65cd59079fb8c882abebaee93f224080a5f0219818f4b1b. 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/BC8Y92400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d69ce73aabf410e56da51193837a61454971962eac89a6a1108db1662abd51. 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/QZMZ92529205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3733f70a69bbc6a56f00c370a2a221f7bdd88df4fde93d7b17c7fc20f9d77ff. 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/BCFPB2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa3f10e9fb90c33cdc5c5ddd7d0ff06154935db3b6a9580fde2318cc0c22654. 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/QZMZ92544397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe54adffddf9966a80289497a3f86f3ac1790d7a30394d0c4588492131ef8e43. 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/QZMZ92544398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae502ddf54daecfb186e2abe5e9f63d16f1d515ca57b437a5ed77a0db7fe7080. 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/QZMZ92544399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9c720d25fa4d9d58d68b08d9bd8950dd5f4ae5d6b0b403f5544d56c3c24d80. 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/QZMZ92544400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d69ce73aabf410e56da51193837a61454971962eac89a6a1108db1662abd51. 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/QZMZ92529205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a51d49270be359bda5e2344c647719c4102b4742fee68e394532f6a482f840. 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/QZMZ92544401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb206599dba2ca5c27d605ccc2b69cbb120a97cf86610086dc2c332ac383918. 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/QZMZ92544402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0490566d24c3566b08627f4d891a979f28282095c42a56f25bcb2b9419d4b533. 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/QZMZ92544403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279a3c15b6abd03d52a2d983bb2b481d3ec7f64ff38aa68e893080641384fb29. 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/QZMZ92544404.