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 0x9c72cdac2747b16e1b60f6790e08fb2fa2a4ed0a42497e7f8cf7859d1a4598ba. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/87bb398e-906f-4704-8b02-e7f12f028be9.json and https://artists.proofprofile.net/proofs/artist/87bb398e-906f-4704-8b02-e7f12f028be9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Songs They Forgot to Write in the 80S: Vol. 1
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 0x537239a598af23d7de681e53624f64011c507cbc8241d432b03b3708755da29b. 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/US7VG2578105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ab722d5cc4dcf72c6f02c08a564b567036b657e44b2faed860f3b729462426. 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/US7VG2578080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8471dda56f66020e0b2a6a0f85ce86bf023642341909cbcdad4eb0fe3a89cb5c. 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/US7VG2578079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77916442cfaf5ae76f8d752d48a7a5bbaa2d802c52fb22a9444baa32283da076. 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/US7VG2578113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65f1b74986786bad775b74ded1179fa0ae9bb2a774575a34fd95ff816967ee4. 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/QZ29K2400329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa228755f19d7c1ed52db85fc65b94510306ec831bfdff533fe1a0253d5e1f8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US7VG2578131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1d2e54c0a15462eab96b59d46fc4fe8cc5a34bdc4a272aae0f931ed157b684. 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/US7VG2578106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb948bb75b72626417e68ad5fca7ac636b6005d126c9ceb2b8676cbe7f1b5fa5. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/US7VG2578115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f3012f373a87db6ea7ba5e3fa6d5de0cf473e9cf1958d560426471eb129d69. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/US7VG2578122.
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 0x3cb55524aa3de4c9b5f7e3a510524abc5d92f0fde53b212d1f89896c4c6f83c5. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US7VG2578123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81c36e30f1d735137294b565933bf53ea2a747ff16eb97f6e03202e7c107949. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/US7VG2578108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9a83a16d25f0793f963c69b548c5dd505361e59be0d683ed0bf5788cafd67a. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/US7VG2578110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba128d0eaf6ff34c1b36cc50eb293830199c589d1f03a57395d8a3ac4d6be99a. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/US7VG2578112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c58efde4344b5cd1e2b58141617dc4003864cf87cc9be53b76e5ca82c316992. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US7VG2578121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01827389ec0198a71a1b68bd96fa94435ec03d22098d55be6ab8c31ec2b60f8d. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/US7VG2578117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24125ddaa50745974b6393d1fc0f0f24b2b2c2e73a7bbfc10340ecdf10786ab. 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/US7VG2578111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0d530f5d20c436cb653cb25426b98feeade3d6b01de9dae54480169afb0f88. 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/US7VG2578094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be176f12c1d4aeda0a2da2e419607031e60ed132bf353cdcca8a54bc0def4e3. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/US7VG2578107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd1a6a846f4a0876b5a20cc514bf128cfa20fb919e4bbf6fc852b54240febd4. 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/US7VG2578114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae06a8640fd7446613c54544a70f209b346ab7b05fc745f32d968f1b55224ae7. 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/US7VG2578118.