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 0xd2200b9ff998c09bd5894fabd15495422c11c6e0e83d333fe1c79433c99416e8. 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/f859be1f-c30e-4965-ad29-68010a335fad.json and https://artists.proofprofile.net/proofs/artist/f859be1f-c30e-4965-ad29-68010a335fad.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 0x7b8575065bf28706e6bad250dd1577cbd695431c00f0565ef873b828a56b87cf. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/MXF551204759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ffd08bb8b8af5d0eaae49015ad8f2f6e1926c0129694d99d66801250784472. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/MXF551204764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd629b5f34468986af1df88608ac08fc4c760ea80dae3d9912617313765f46b9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/MXF551204768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1299900adb5986a8bc41342213e4af2ec02988ce901bd5a761e9a7506ec66956. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/MXF551204757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c36071971c734c8fce89dabe1a92d4405249fd4a82184389bd265cc3f549c6. 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/MXF551204760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc0610d647f0e17f39014c94023eac978685adff91d53e5b687aa334d914abf. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/MXF551204769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6281a40d3102bdf6c9d8a33a7eed44b588b4cbbb2c6eb341575d9b6b7cdff7. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/MXF551204770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8010c1e46a918232e470e5c5b5eb586d27d88aa1f80c8e629669f415111a3179. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/MXF551204771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fbc71455aa4d5abb340e5a0a98ec36afc5ddbe93c9c95accc1317bce983d90f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/MXF551204766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x059592951ab2213f3cf356eaaff7d2ae2b044557e37a4b848e94cad6db181dd4. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/MXF551204765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84e8144b61e435be5052539f2364be5f8a560066b51081ae4f546ed896a5d81. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/MXF551204767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b0876767a553cbcbcb0c91fbae602f1048d586f5baa002e1744ae0cf1bc511. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/MXF551204756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56171ddff686d45a36a20bfc73f8186b8e140daa8a92b51c48ac10ddc5167d8c. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:45:41Z), 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/MXF551204773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6856eb8f399a24a3093908710d56505a87c83cf138e1b1d588cdf2ed4ffd139. 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/MXF551003520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a97eefeca546db1b751824e1c95f6f90b09b43bf31b343480a8a10437327498. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T07:58:13Z), 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/MXF551204758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7714cdc89fbe6cc79daa811dabb28adda673953ff92d5166de26b9cf3e2de037. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/MXF551204772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28fadf7b6934fc97c71d42aaa687d316bc7a9ad4326bf09262945fb2c6b66524. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/MXF551003516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a5050a5d1db4089c564f43d02aa7894463d2141444818c6cab3076ef0e0e90. 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/MXF551104481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e4ec2cf87c98d0aea3a2a2f1e1e113889aff7922db6f21a4a79c0a90dc8081. 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/MXF551304984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e494523e48b37f993b300bc72c4baaf5ccfd5f2859165d2e72bacbe416ec78. 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/MXF551104483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1be817449ec8b87471685411c4c72becf7e00a9f71ce00b46256e3572502be. 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/MXF551505188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f500b9d69ca0e000183ff1e32c967b3807e2732cbc57f71b17de38816e2baa. 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/MXF551505196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2caafd313be46654fa9808ad44d5b158efb0638511d59b632948a8487819ce2e. 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/MXF551204763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36088f0e4a9795974608a92fafbcdabdeae93c871cc60ff4c79c6e651043680. 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/MXF551204932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04bd9c969e7ba5c049416273f2521ec349b54c83d979fa2691f18c07ae3ba4ee. 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/MXF551505186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0b84799e57f3e05d23c7b522af9a903ea28b3ef6ebe93744897e99d4d0cab8. 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/MXF551304990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2399b6eae98629b2c2c6636f603173609054afbbdf2381e80ad42e19d7b0bd51. 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/MXF551505193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1273dd5ddee1cbc14cc430066c6b6a458c9194e7b07ea9c62e6cf5a0ee17d353. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/MXF551605376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b6ea874db914421321286c96ff8fe933944f2b819b32bd885fc635e4a108d0. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:57:29Z), 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/MXF551605378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a442efe3b96334e47bde3003e818589fbe48899db26188f130cd95f6cf74a8. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T02:57:31Z), 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/MXF551605379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe043d234f4fc04417cce936c2a9f534f3d3c26fb8ba396ff491abd57a5e4ec8f. 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/MXF551605373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee36ac2df413a55b57dd0d2a279b739ae613826c9b9e61ab4789d73b9aea3d7f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QT3F72557902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0647537304deadf7e030d2600f5ddc8b68538b80eae354f601341d5625d458. 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/QT3FF2561304.