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 0x005d10fb19ccea3f52faf3dbfd3e80fde3624e6e9f70d3b0a2b0f17dc91a8970. 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/0adccc6a-89a7-4cf6-a299-0e05377a89b3.json and https://artists.proofprofile.net/proofs/artist/0adccc6a-89a7-4cf6-a299-0e05377a89b3.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 0x0c7e517f3fc6ac36ff9fdd393432b28e54c5096791d8241e6764cd68ef49a642. 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/NO2DY2300684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a31d78ed214a03b25698eda87a8b46452142072a0f02cca5c0272165a5a8fcc. 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/QZNWQ2413515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4421aac873cd0855ca13c325fef58bce28e08e9221823431b082e95277d2a8eb. 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/NO2DY2400261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea795133683e5f7e9df55510c1c69416447e911d77ebe09a7314c158b660260. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZHN62478623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa078bf6c15ff32a2b7c9c9300b45ee604da37203fd04355c1a413b7ef8c17e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NOX8G2400071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c214b6e5da2731a6463d2171509ea6ee9da583217d558e3ec306b7583f32b3. 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/QZHNC2446177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2922ba6ea1a5c136262acb5cd543aa085601d9ea8773d2790990f61056e538. 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/QZHN42433673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a8cba3b519760f9cc049ff1fff3c7fc7a9d929d1e07c83637b4d6affd4d154. 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/QZHN32487507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44e86ad9d7aa635ecde2f40318665def33479dff14c7595e4ad09968861e49a. 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/QZDA42461669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa60a576ab60ec071a4b89d32e21a09a73a0c245160963edb3d820bd2123fe3. 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/QZFZ42424767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943d6fe612fe01b3d654d0c4710b39ba8229bfca2ca0871299db50911ffeaea2. 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/QZFZ32483841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5c8750818502495342f4f46010b0dd4526a5c47e7f406117bc2e4f87496cad. 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/QZWFH2350163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfbebde79d81318cd8691f0bd8e987286cb13f944e7543d58119bc1bc33acc4. 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/QZWFG2378408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a57a2efaa4665cbf5192feb2d455de6fd4e8ca89d49e3162f5e92b596dbb22d. 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/QZWFG2303309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9612ba8c27f36368fed433eb6db52958210da99a98780cf7d17bbaf60e898ec2. 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/QZTB32327070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead5d651675741cc62590725179b4a13d5b94e97855f12ef685ae42db580665f. 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/QZHNA2364115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8eab9988a49c0262bd86924931dfd1f5ef024d1b2c9953c17f90b899cdcf0ad. 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/QZHNA2398338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7407c6e35f49b9f07f7126ddb9a5affa9eac7f4d3372648fda25ecd55a969182. 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/QZHN92315986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182dc410756e63a81a85f57c61f416cbf8342de1d26f787d000d335a7914eafe. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHN92395107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43bb62b89565648f729dbcf59d53d2712916dcf5c9e487829bff05efd2ede257. 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/QZHN82395195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2800334e58f7cd1db8a5697bd8b3bfe867644b1314c11425efd5b9f2d3d8cb. 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/QZNWT2236492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc22591906365e2bc587e7151cb621cd6b6e64bd3bbd93639870f2e73d00a266. 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/QZHN62229701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951696ba22c62d81cc27e106883ebbfad8815466445449ac86c8b690d2aa56fd. 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/QZHN62229702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9cc84065010d268394997e7219257824b3ea8f6c7f2ae15e0b921b5e9570d6. 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/QZHN62229700.
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 0xcb9ffe591787cbdeb8577a95505cb32716206a96206891879d6373f95ddd30d3. 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/TCAFO2142160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43331ba6c7fa302cbdd5df4eba553897639b5101013760be8c324d20a0c6b60c. 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/NO2DY2300691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91445413bf2825e45a230aa7ce7cbd3411915610f6af4254ca2ad571dc62fcd3. 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/QZHNA2357588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd430e9eceb8810c4fba091548c645406b8d8b0b09a806cdb30e89f229d36460a. 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/TCAGP2285721.