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 0x9090e12853adf27d59bbc3b6956fddd71c45fcc0de871edcedb8e9f2a6c46229. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/07144c17-2230-47fd-94e9-1bb69e4e4f99.json and https://artists.proofprofile.net/proofs/artist/07144c17-2230-47fd-94e9-1bb69e4e4f99.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 0xa38541a8f4583020be55cda7efeaa6e9ce40b6db5d057c29a0c5cdfccd18c5ef. 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/US94C0524201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8836ff27f6e6c0a4787fb9bcbe2cbda5202e6180a72d1539450887a7fe9840b. 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/US94C0524202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705a564aa5ca99311bd1abee39ea21a8f4186f1d2d0f7e673421cbb6f59cd2ad. 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/US94C0524203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3238de866b0a050601401e80fde621e03e27c1aa2b77c3eae62de802f0bb0883. 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/US94C0524204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dcda5b246eb3ef7ed5526a2fadfa1e039262dca1f7dd5d25732c391e31f5128. 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/US94C0524205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0341d999a0eeed564707149a6d671b384463f8e5e59cea79d94eb8c55391e014. 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/US94C0524206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79eb14cbf65fdf2bf4833284903efe8ddcbc65befc7134a6ae1c6f0c6e7434f. 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/US94C0524207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712eb5e8d8ce5e2977e04fe5631395f9c4f31454fa93090884aea39613e18e2c. 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/US94C0524210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe951620c4f5b14d417eca7593538518c097872aebd6fec65fc1d6f6a6670d0c5. 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/US94C0524211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e6ed6237ea63d44a64574ea943579642e753784d862633b96da41cd6460afb. 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/US94C0524208.
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 0xbd63fdf3c27abe087d83d07f1fee01cb5a0116fd26130976b0b0ac1a69d1c20a. 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/US94C0524209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3d7b2cb62f3a48af68b83f754a670199ef5f5c8642e67a065da951378b86b4. 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/US94C0524212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7b6746f3816c3e8680a915c3ae906672f2673ec3ccb54e27e0ee4b3faa8723. 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/QZK6Q2299432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1564f69180d2f692b0ca436c87603c1f1655b02e3adfb3988899d484848ccc0a. 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/QZK6Q2299434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed27b5b1cb195518224e7a00a6c6337bc2f53c3b250d7be705f6b4eb91f857fb. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZK6Q2299433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e318eecb82b2a6d71686448da4416b69cf3803461699b3899698b8407c7a11. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZK6Q2299435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcff7aabea2d105e7127a58a165c827aefb424e991f5344ec7e8b1de9fd70fe6. 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/QZK6Q2299436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45cdf6486d2e076cfb0a3064d06ab35341027566fff9bfbc9b33ab812bd7e8b. 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/QZK6Q2299438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59b526447be1cb00242345ae3d56aeee7b0fd20455359e7771250f2578c9b6a. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZHNA2224175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1e82e9a2680027436694a7fedc4aa000e421b5b3ec7fd20a95983423158f5b. 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/QZHNA2224178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4050f813abccd8b1fc6cc6dc0433684836bf7d5399b2e81d2faec0615604e027. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZHNA2224179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6a3fd8b172954b393faefb9792b6dbd6a5c0ec7b3e678de80b3a14e3583350. 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/QZHNA2224182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e3eca470ed05408ea3b77f3a651933796727ff33203c949b25f4a6ba866716. 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/QZHNA2224183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84e4b26b4c4e03e264b601b3428878d98e6c471ab5c2c7842ef94e3f122ee3e. 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/QZHNA2224184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad1ac4f05f9e1173e818f9ddf327931f8189fb227520a04423a484e891010ff. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/QZHNA2224185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71dd374f7150925e8278ab2db6214be778ee231aef11737915fe0cc05e649af8. 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/QZHNA2224186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa96abc2c2c5c504e4cf6d0c4837f0947ac42143cd57501ad9f48c904d4eb34f. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZHNA2224174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b92ff19b40f860d0ae229224c226d67cc86d5764cf9568000a6461c00a74a2. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZHNA2224176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8af074088afa21651e9c60845d529540b88457492812635e7b580a83aa4ea9. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZHNA2224177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb0cc17e6720d69b2abec55f8288e11c3aaaa991b05167d5ae5819c24887b04. 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/QZHNA2224180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65d94196d5ecc9ff9496c0fd053645dd45287bccb4c6a7ee2384fd5b1078880. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZHNA2224181.