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 0x25bde3ea1e13da58ba141b43a6f152323bd36554fd8447622826c0b409703997. 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/708d3ede-6639-42b8-a0df-c4cfdd268e00.json and https://artists.proofprofile.net/proofs/artist/708d3ede-6639-42b8-a0df-c4cfdd268e00.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 0x571d3ef941fdf583eeb97f97eec898069defdaef1bd4c1b5393390de410201e0. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:47:27Z), 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/QM24S1703026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea71a3aa9717eff4c9ffacada189ca55b6eecdca8ec72f947cbc5f372ed1e7b2. 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/DEVF11700227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e22b72b276f40d5e647a40d4fbe02ceb6de0f8be6ca2f0a2c41315a4bc2090. 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/GBKPL2002081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b62d95b3cd7f43c59d3dc0ea08f5d6b225384d18022c74d03cd78d454a9a6f. 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/GBKPL2002082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0aab84b05196fb69f82d4c96749ca3caade6700cb8262e8b0eff39e3e6a0e0. 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/GBKPL2002083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9148ccd139cb4da81b762fd1e7b0dc5d79d7a70e7c57b31dc38ff953e75585b1. 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/GBKPL2002084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5dfe74e26d3ce7493cb8b8e28f148680bec01f060c3901363078afbddb9167. 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/GBKPL1953520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aae7479a6742101edbcdc0c913f777c9aa1db2056ebaa9c24e800b3f5c03fbb. 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/GBKPL2002085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd884d75f8e597368c65ed0866b9b643a6f3bd9bfcaeb2dd309212ac02d09bffe. 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/GBKPL2002086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49df25d482fb5ed6706ea6a04464c61006ed2035fa1a302845b6b183e7fb5e01. 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/GBKPL2002087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e132c1a651f05b3e531a5abeb569c92e5748e51cb475431591724849c6f727. 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/GBKPL1953518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0940c5293ab57ab166ebfa71023ad732e5b02e474e4870b67d6320c52b3ddfc2. 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/GBKPL2001745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3c6e8ca0d50e4c8dce78307c8c5454279bb045c7176a47a9e428a30f7252fc. 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/GBKPL1953519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e5dab17527ad248c1c382a5c752958034099912a2559f9dcc65cbad0ff3b80. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBKPL2002089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d088fe334c721e478366ab7a0a613c15fc05c230d0d932e091e57ac5dd9f051. 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/GBKPL2002090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52c0d1e83e038221f5f61ab4615b6673ed3aa27adf4070269cd9a9c9bd4384f. 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/GBKPL2002091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9bb89c395cd2de6f4f6b4163cd34f22e4e28e4a789c8829b486fc21a49e7ff. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:42:39Z), 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/GBKPL2002088.
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 0x4feffd945db48ba2d2847696395220c8720ab01709a0347281367a9ef2863f76. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DEVF11900890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8cf6ab998cc749cd2743ed4fb5ec94a635a20ec62cea25839cbef5e494151c. 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/DEVF11900892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33246a89fe0d4126a43ee6586e000c08d042f466b9e99031bec822c42733ed12. 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/NLZ542002134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1659e5a17c4cca009b99a641192176454dc7efde89e30907311255e71ba09ede. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/FR9W12402071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ed8929201b87d0c9fb7ef6c514778d3ae079a1a439ecb0f0c3345aa890923b. 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/FR9W12302651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ed8929201b87d0c9fb7ef6c514778d3ae079a1a439ecb0f0c3345aa890923b. 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/FR9W12302651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0a19ded2a8662afdef9222a17095d78bb746abdebbabe972cb5eb57b387058. 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/QZS652179592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e3aa959b5a9031019410feffff07809b91c92c7a90ea41e9856c3981836a24. 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/QZS632129908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755226c40b36fa55e8be49a7912c57494b552b183ed977486dd8512ef89e6359. 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/QZS632180818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007970c949493a7cbb05377a2cac05006a6e8fb632bf2d2ed6c2b25f11d9e1b5. 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/QZS662104111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8bd295b667518432e843ae9344d21253c2204dd2fba02aa92986540ac9d60e8. 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/QZS662134889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e9296f44ddbc8b0d2e700bc7f3f44971ef74c8b8b2a960ab401b2d0cfb3b8a. 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/QZS672142644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67376b99898644efd97b5c8c06e4441871acbc7ae221aac6b37c9af8031690d9. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T16:53:17Z), 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/SE47Z1900301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c05b71fa15b5cd3a688985ca2b3b0f707c900ec06a6a5f97fa057aefe1ac830. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZS672125105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe362162d22a370034f7af617003523c74ea0ef4b657302f75591104caa37da50. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZS632111855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c7c90d93f94f3aade51b75053c51677fb71807d67190b685d028d88ac5dff6. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QZS642134961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad2a70ba210ac4527fd739310beadac6775b92b325fffe97f1f4e1772a1e21a. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZS642100343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8440476e2a5afecdd96a31a8a6503b510f76d11dcd2eb6bff8ce6f43cb98ab6b. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZS652135245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86af87d609fecab2e1406ae8527a400e678d3953dbcada91347e867c801ea696. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZS642119940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2c007d20ec26bce9e75a920a4921d0c385df80e92397da32730c2a4621831b. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZS632194426.