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 0x81f8318edbcf6e2ae3341f27b1f0f34ffdd872ca1541bb7067b98fe5f49c4914. 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/c1da664a-98ff-4197-8e51-21ff78c86aed.json and https://artists.proofprofile.net/proofs/artist/c1da664a-98ff-4197-8e51-21ff78c86aed.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 0xfb4176b4954e9504b0e5290beeaf407feb44102f3dfca1e95655b8997b3bdca6. 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/US7VG2431823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b0c266ea61353dbb8f635d467436db5482a6ce457827a828e05f76cd32f690. 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/US7VG2431824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694710fcad7ed29c5eee2c594edc54c6f5d86d738f6290c2cd7ed3b1345b5429. 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/US7VG2431825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c0d524fb3d90ceff754fefc59c612c321b3b353fd9476d4f52ae61ff4e73e9. 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/US7VG2431826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc54aa733c0c55adad86410e3933e3fe4ff4ed53d8603a0925a7a0ccc459efd. 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/US7VG2431827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547674102958aff9f0781f5b4d1b745923b0add7ed0f2bd51be1a0f75c693d99. 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/US7VG2431829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996c4ad55f7ec57f7b8f7ea6635c183a2292364a45e50a0fe0a89b75a0d40de4. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:49:13Z), 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/US7VG2431828.
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 0x15d6fe7202d4f01f12e66170ef24c969832afac700fcfa8f478b27d295873d03. 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/QZNJW2270388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbee140ef7e3d1b85e70857aaa2771b40a14960e17d5739123d45cc8599a897a. 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/QZNJW2270387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ffd9e3de62757f11fba89d0db01d88a3720a1677fc00261a4ca5564336b0ba3. 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/QZNJW2270389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74715e5e44bc2f3d49f705d4482a26251af76653ad22c268185bf9e4d8acabcf. 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/QZNJW2270390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07fa93fe1a2f74986c26f5acdc9cc9a8c34c6877d6bc198722429a2232461f4e. 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/QZNJW2270391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513c45933821f0ccdf2100fdf8e69603900522029d3d71ef26aa17e2cd2d7b3a. 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/QZNJW2270392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1766db8ba0663dc07e8cd7b6a0ef23ba2c3c6b450cb6067f8802f0b7df315e5. 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/QZNJW2270393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245d711d69a5b45404b3e4066f496e142e9cec83f93a66c9b48267a00f6e9f64. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZNJW2270394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99577206bc87ff88cc05a8e250253c853897bb8818911a93895507dee3729d52. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZNJW2270395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c87a170d3cc7fbc47fc7f1eb3377cfbd15baa76de9859177c8300cdc25c0821. 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/QZNJW2270396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55442a2b9fad198dda3baa486c94af42893689234283904441e747564a7cd208. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZHZ52043188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b376d681553013d6944ee3608774f77fbecb66d8db6ed375d5e6b3917b1e755. 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/QZHZ52043190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1182b8b02b9e9b490daa6d30c6dc48fc0b90933ff34747b161a49945d1af5eb5. 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/QZHZ52043191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c4675122207467d4ddfa2e7f6cd8a149ee52bc77555848841b8e521b1c92a1. 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/QZHZ52043192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0779784603a7fbda6ccd1be23a8dfa8556166693070ecc0edfece5a38119beae. 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/QZHZ52043193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69dd1894a9730c8841e1286c7f34cf48faa6e1dd7821715d4c04b4eeb75bedf4. 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/QZHZ52043194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac514b32e79b2e8daabc31e1c89a816b936517656d0b1a26251cb27646ab408. 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/QZHZ52043187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48187e94a03e92a55f294013baa16d5a2e88af50108447b97b96ca600baac75. 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/QZHZ52043189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf79f0a002d550a46adc5f785ee4cc6b3b0e406162c6200b438aecf6a47c26d11. 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/QZW9L2302810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04feb5151a00a6594a5906fe300ebcda5ec5abc2003a81c7e6b039fbc2b5b604. 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/QZNJZ2331196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9ae0f41783d4899d1b0947a0ebd6b3da77f8e2a1985c519e82c1feb77dcef7. 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/QZNJW2361692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91fb94a6680fa424dc8f848c76fa6ec90f190ae4d78020c5d37792a31236ad16. 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/QZTPX2122885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126405254daaa992f7978c895918c4006729169ac80ef292d1b3cab6834890c7. 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/QZHZ52161879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e32822c882930708d9cf49c04117377e5551dca9afae2e7cfcd8d2a5a27da2. 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/US7VG2113537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ef18333863acdb1d1a15ed07e553c2f5613e0a3b0c187c017f7447dd576af1. 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/QZHZ32188993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57af6a686f3319d642db894a26c3c530d0e2e93742035f976e2a328f0b3de236. 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/QZHZ61903341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16fcceb5b076d27897ea22cc1f56db927426fb1b12698184cfe2916bbd910283. 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/FRX872435966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8caebce9ffbb1992153b625558abf99421ad4c5fac9b871b11f32f5ccb1e7e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZGLS2467787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db43a35f787981e1f796e78bc4a4df6ace6027b336a8b55490828b03f49a999. 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/QZGLS2466292.