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 0xe85c8cce9d585849441b28f1b2c7be8470974a7098366238befa95e67d9a9663. 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/d0c7ab4a-3346-4e18-a1c1-b7b4bd6bbfc7.json and https://artists.proofprofile.net/proofs/artist/d0c7ab4a-3346-4e18-a1c1-b7b4bd6bbfc7.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 0x133181b7a17aa25943ff085af19b11db95db64a354143c61808ef2a9238515b9. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/SE5Q51902614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b4b343598898c4d5e5929e5870c4b816df84de80f57cfab9b3d8bd165f569a. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/SE5Q51902898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89d74f4ce2f9dbc01e417a02e019522dc7ac307e56d27bc41daf0d60db467c4. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:07:04Z), 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/SE5Q51902577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da34fd8e76d88dea0b82971fe8d9bab909e806952ea0a736c02c2b30d7c938a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SE5Q51902361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873fa9968bea62a60d0268df2294dd25ea60bd7f7ed9981086ad61d4ec882803. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/SE5Q51902362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590fdc495d26513ad7db0c985774aac1067e99b8242f8b98a38b432778d4c5be. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:16:54Z), 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/SE5Q51902363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4831acbb330e7d40684f5ec607167cecb05cc43b1ebfc4e49a0a038cd4a978d2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SE5Q52002027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79d54d6cb79ebea281366b9dd12320ff3cfa82cc7277e9f25481c3a6c27390a. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:06:02Z), 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/SE5Q52103178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c557e60e7f3ccd16bf3d0640bd2473ae936c789dffc9c1dbd02dfef22d5752. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SE5Q52103049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9c5dea9559e78da4190fb827027c0510b99878bdaf1a6c7182c23320099cf4. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:14:40Z), 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/SE5Q52104484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62499de52f619ef3de5213a59a9a54a77cf4939a1cce99b974f7ff396b8f6e67. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/SE5Q52200846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29eb4f80330bdb2d92d9178b5cf31b5aa5d13a989ed0e65c2cb07bc58d26483. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/SE5Q52200827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c382468bea0149c142cc43e621a14dcfedb984eee2f4a6d399e1bc87d610b5. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/SE5Q52201800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041dd2fe7e93bf753f6565b1672bec1c5ab0723bc6f5ccd53d21eba4d10600f6. Chain 2 (Bitcoin): anchored in block 957835 (2026-07-13T09:48:24Z), 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/SE5Q52201804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b91396585b193a95c7d6f0943cd0ef2060efbe8d46bebcccdbf6e6506b1d6c8. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:09:13Z), 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/SE5Q52203301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630bdbcf3fc169939f7c79e82f5ee677bf9bc89d8e471fb7fd662a7e4b4474e9. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QM4TW2340568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0acb855ab3316589e5f2036c3f33d11bc798a07ede08a75cf3d637d08c3dfbb2. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:05:45Z), 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/SE5Q52204018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0bf13bad0af7004a12f08811422566621eaef8275c3ccad0ad076a6cb335df. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T02:37:54Z), 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/SE5Q52204017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970a36bb9c75e34f4e404d299be9a7f4115241d25fa6b12a7d4b358851d862a8. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T02:26:26Z), 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/SE5Q52300904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94921cbff5337a6cfc1a856589114e4c3dc792adb8a5d3c9de597aef2c0ef94. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T02:37:44Z), 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/SE5Q52300905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a258fd8dbc7197de6bd79da39f770141555b0f254342406a142e9b758f6d1d7. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/GBKQU2382770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7bcd28b821e383291186441ff14da1a4a65b18e3c0bfcfe1c20aefaf0e7dbbb. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBKQU2393362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f21ec1f8a30d8fbe0c660b4dc8877529a8a90946924b1493c9cc486cec1d60. 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/SE5Q52400255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a144468b0ecb067a81e01d5ec9d944304b6992ffe50746a93e60ab1cf9d5c3. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/SE5Q52303004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6602cfacb5a58b53cd256fd0ff68f92975fc5182471c96d95d1166a42380520. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/SE5Q52301758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa527807bc5855c7cc8f17665c3607b99e61ca75640c9ea58c8d928d61fb71990. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/SE5Q52401049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598ce0ac45939fadea3367cc346e5b8d8d1abd4bf0ceb8b5c59ca19e57c3743d. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/SE5Q52403144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e7fd113ef11a1f06e96a170a10c40dbfafae61ecfb1a2239f966a351c60bb5. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SE5Q52402925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd046ca4126331ceb845245c27a687d8e1aeb584f030322419e53f24bac11b529. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/SE5Q52402926.