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 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 0xe50b1ef75bf47c286b0240373d704f8d05d98e9a423f15a92ab858e7480bed25. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/10c14589-fb17-4cfa-be96-f9d1e079bdbd.json and https://artists.proofprofile.net/proofs/artist/10c14589-fb17-4cfa-be96-f9d1e079bdbd.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 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 0x043c1231433e9b99430ab970d610bfce6752811a889a5f5f36d9454b78a64fab. 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/NLS240800073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdadbaeea0c50d5c520e73a9a3d26b7c37fa8606f1b3262d650eaf038e222b52e. 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/NLS240800074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27e27b1df93f987fa840968cfde3acce34625ec713e29a6c1422c8bce4e5fc3. 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/NLA242000205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613b596ef0d850b6a3beb1988bf9159a56af165545623399fb5a8bce1281ec6f. 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/NLS240800076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b9afd6827acafb617f4891ca2b86665284797719d08252bd90ac3332c4f0f1. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/NLS240800068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc12ef7aa138b097e8aae25b3d345a94d8e7ea1f82e91253957db877e504b755. 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/NLS240800078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f5d131ee5e07e5443f4c437b250dd55023a25ab0b08e755ab8c3af8ab95806. 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/NLS240800079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2257310ca7e45817d74dd32259bf71b11bb2f947d54666ccfe64386345ed796. 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/NLS240800069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47e43c6fe82225e8a73bd3d7dac1497a89c11733c7ae4ca2c01914776fed876. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/NLS240800080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a5f9ccaa90954f5db1891bed743e5015da738c2548e09ab94f70d24325c117. 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/NLS240800081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423d21b469008cb1139802a31bd21dfbe02b03490499669429d0ca6e3a242e01. 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/NLS240800082.
Willie Batenburg & De One Maine Matsj Puppies
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f07d736a04a4f2b3fef2d38d4da1a9b88a50dabc0db75ea76a480c2770db1cd. 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/NLS240800083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4650f4fceae7aece3f0997af866b780be4bc9135ee73e9765f5234ddeb469c23. 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/NLS240800084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7868b8b302a59b51815c27688238a2ec4d9c1ca945bbe2464430c4dfb8f3d3ae. 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/NLS240800085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db70058b6feea56ab6db9bf56b4970ec33e786ff8da92fca05fa5e9ec6279ab. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/NLS240800086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0928fe7324527732e7798ff746ae778b134d412a9b17c40790d0e46ca25326c. 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/NLS240800087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502ccf2d0fc0d143c47a7eece08fa26154ef3a2c4765178758e889155bbcd080. 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/NLS240800088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba02b6df8f9acab70b9790ec8f92e2a993b4329058d5c135008fd71ac375ec7. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/NLS240800089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f5f3b99ec5375712e2694c1fcdbd465ef70555c06c1bdadf340510c21b32c5. 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/NLS240800090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d26d8e6d773fbc582eb67519b7fc8c174789504b50a9923119b3d2e26e6a35. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/NLHR50926033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d599f62c17af59b1eed6637d69393efd224697d45c12e1f93e478650e6783b8. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/NLHR50926018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0ec2d91dc9938f037194c278dfa4916edc3f9ecedd6f8f92f71e8d5f21e64f. 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/NLHR50926037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22058fae2d481d43cb610469951486c5c8b8108c5144a2654047c454bcad579c. 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/NLHR50925991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956d6303de19899a16353c34052ce2daa405a7445ac3d5b53ec3e60829274fa3. 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/NLHR50925992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae26d182fa34f2dc3379692ea1adc4a9cb0fcdea051ef9bfd651d0049bbf6c9. 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/NLHR50925990.