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 0xbaa2ffe2e824154aec2807b7dc651e96546ebab2054d0a4169527a9dc4ccf263. 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/e4f23759-1535-4f2a-96aa-0e84cc7f6bcf.json and https://artists.proofprofile.net/proofs/artist/e4f23759-1535-4f2a-96aa-0e84cc7f6bcf.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 0x873926b8069cc7842a27aefe9ffaaa6cd28fc8c4758e786dfd4579352bdf8675. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZK6Q2038914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56608d052d078f456e3fdfafc00f636537b4f25fffcd116bf13950389c4bbb41. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6Q2038915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6291eaec04ee641b29866e3e96e7a60edb5c80b63c44272c8742fef04b8f4b5. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZK6Q2038917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5f3e7f29530cd8106815e610cacc31258eb03dea8ad21af40fbec312260572. 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/QZK6Q2038918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e14b31e12caf029831b5d0de3c0c8f01b5b3e2d60b13af17d6f37a19166d78. 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/QZK6Q2038919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d55ab7f09fe0155ee6b200363c574855757c89838762b0e40c056b560d065d5. 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/QZFZ72243737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba036dd68bd87bc5a898d86cdab853602d725f1477b952d39eed6d92b2d383f0. 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/QZFZ72243738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2429a30ce3a01b44eee0959e13aed79eb9fbab5e501cf3726adc935838ef23db. 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/QZNWT2167336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd9ab6233e59b383ad61112de7841215dd5502325f462efad322ba7c824f8a6. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZFZ62277503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3e9caf520209ad8c7be11a906f2fad41b378e2ed84a865a99f806718740864. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZFZ72243742.
photobooth (John "J-C" Carr & Bill Coleman 808 BEACH Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e00e99ee7cf17e9f6473d23c0c7824c0757964d9cb6f154fdb54543bf4af7a0. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QMFME2374992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe352f4a0cd406357677776617ecf5a6754bf6f20f27cdfeebf49368fbc4e4588. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM6P42415021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84bc9a1a327373d7514a0b9d56f78539bf802b50fee8594b7461faa08f40377b. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QM7282425976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a348801e39c32d977b7c78fb5f9a6391ed2f431b8db024f6578eef8ad2eea5c. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QM4TW2436346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499540ac233bf8053e54872e27e7c3d56097817e2c06f3265f0f6ee4c3838051. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QM6MZ2423261.