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 0x04dd9e067693828f7b34439ca846dbf69deb2785a7ccdfe7ec4f564767cf1d75. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/473f70b4-469a-40fa-adc6-6653d4a7cda4.json and https://artists.proofprofile.net/proofs/artist/473f70b4-469a-40fa-adc6-6653d4a7cda4.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 0xae9c09c56bd5b0432ddb21389574b97beec2d1b38e5381386434ae6724690da2. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:55:22Z), 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/QZK6L2105046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6411627bc75d2f7daaa16c65bef02a14ce394066c791fdb8aab5e22c53fcba8. 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/QZMEP2137127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1db60ad242be09a57aed8f377c8b3485a9dc6335a6d6b73efbf3184e5258190. 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/QZNWQ2168385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41fdc80fe52e78aa6d9f432f2c180b3fdaa4e3d7d7dc634e1b80091f7b2fd895. 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/QZTAS2189730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d217c4d638e4262361fa1161a73bceeb6735896a9daaf7dacebd55d51bd4a8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZDA42280363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c7f7e4879dbd036403bdf4e6e00aba3199502869c67ebdff44b6c7e4ef79b4. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:01:04Z), 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/QZDA42280366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c510aa776c0d7d8f40cc6c6cc252e587d6f4ab204160fa6ea269dddb970c473. 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/QZDA42280369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972af93c6efaa59b1d54ed7d4e776eabad72eb6ee798133aaa6c95cb7464125e. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T13:00:38Z), 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/QZDA42280370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93b174059d1813bed532e9c8af4256795d2ee049fb61c9d51baf6423332ea65. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZHN82257812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ecfff7cfcdf6ae41ffc6ba806b533c6d6935f6cfcbc99c3c224bd6c855f808a. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZHN82257813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd25d09ecf558aed9e92c7156b4f25e512fd2fb024042bb64d5c63760a80bb29. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:37:36Z), 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/QZES72269941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2125e97d9d06502a4b1822b3ee12898c5845ff8072b6b578c38c7848bef225. 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/QZMEQ2216198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b5c8190a8736bfb91c8cddb5380b3c88b7f3d625b253e4262c2a6612d5839c. 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/QZNWW2236449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1219544c6101011e122c90877bb6c632d29081543f7f57da34b954ff736e8b25. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QZNWW2236450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ff57994bf45d66d375b39fff7b176739fa6b8f2ec0d72ca6e561d698ad3ee2. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:16:35Z), 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/QZNWW2236451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf612774b829b8c86de063a1c57f8970c3bb8b0e380328cdf27651da11b97f8. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:18:14Z), 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/QZNWW2236452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2586e908ee2a829d702c041052cd84bd1777d786e98a887fbcdfa2cc43edebf0. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZNWW2236453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a1876284790df95dd9869b3fc0eb04411325010af16e228312394ae555e8a2. 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/QZNWW2236454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16c8f5cd7d19c8a7b65a0e2e1579bb8e6c9ec13916e2a845dee423c817155a3. 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/QZTAW2288425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14dcbcd19bcf7cb17b40bff49745915dff36e0be55d6e64babbe3f8ac60b0ff7. 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/QZTAW2288426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782bb58d2fca3eb659f65cade4d6ccc85ef10e28b3ea71a255c84b53f9c0a1d9. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:48:38Z), 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/QZTAW2288427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6239f905ee1a060d5ad38b86f72e6e14615277857216937cf64c28e1a2fdd7. 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/QZES92335314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd5de2befcf2e4f581810bb260763ff65ceff729ccc6fe10afcca18bd2f6d4b. 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/QZTB22394457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd63b4531355d0999d2142c2166b4cb118437908b8a4d6cd4b515ceea6db46ee. 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/QZMEM2375890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17db64fe3dc0e3718fc932d32803018b580abf960742863dfa6b617fd37b706. 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/QZTAX2210939.