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 0x6df06c27325ffd9c6720e230685e4eaf8c596153339b6983055677dc1f62d94c. Chain 2 (Bitcoin): anchored in block 953667 (2026-06-14T17:49:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/57c707b2-9be1-48d5-a606-3c50cb4f4830.json and https://artists.proofprofile.net/proofs/artist/57c707b2-9be1-48d5-a606-3c50cb4f4830.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 0x5fa53934086d22caeb0e42b32bf1efc353b525dbce8f857070e2cb23c472dc1f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWFJ2518894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce671bacb043e505e203f631bfadb580991f5dfa22a10f5c50fc4c7cdc01f45. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:05:07Z), 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/QZWFJ2521410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0db503eaaa3747b78de6fc8728340498f50849167048b2618d746d28649a4bb. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZWFJ2521377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1403a8110f516145462301cb4e2fedc1934d3f0dcc3ec6c0b4f1d030eb862a18. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFJ2521419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d021e16dae458e87ab0cb3cd6786f97e18aa2f7cc98950549c39fb964bc2dad. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZWFJ2521421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3290b10c665707adcc5b0d185fd2ec8cc85bde3d62f259ede6984e5af1e0d76f. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:44:19Z), 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/QZWFJ2550991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0861b478113f8b11124cc3e7454410ec00db4fe706fc6f01ce125fac637d978d. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:20:43Z), 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/QZWFJ2538953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97fcbae729cdb8fa78c75600aca4847ef9aa008bdd51706483a9461da7bfd64b. 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/QZWFJ2557892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1e6f7b71484ce32e1d1c81f9e5f23f19ccb909ef06d9098189b73e362f4bf4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFJ2536985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3cd108b0a184ea346c779da187edc9268f7e66d34db87cd3f12df102f0b42b. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T03:02:03Z), 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/QZWFJ2528868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f148bf244d275c64da18b2eed839f33252664346ef2c7e432161e0da41d47a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFJ2541112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb60af150874358ca6a20e41439949b127f2b57c4defc8be349f026fa9ddd7c. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZWFJ2528856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c43335650f69964fbd144e93e0cca9fe15a887b328c3a44ed8f37585386bb4. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZWFJ2541118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce234483f9fc2377cdfc883cfdc19c01c67e7fb00ef90b622dcdd24781a8d0e. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZWFJ2550994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb545b025f56943a6ec756e379c38f35830b7c7b53fcb2dd0860745fbaaeb172f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFJ2531997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe60f53686236ba97ee0bc356f4bae041e0961309fdd951ee76fe083402a91b4. 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/QZWFJ2560031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807794eb74aac9cb8fbb088fc3cbcfbb69da70f9e4305f8fab693fca355bd67c. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QZWFJ2551019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd42c9a210b39a3127fa82f1237fcba474b10598d1128962a879e0db46bba220. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZWFJ2528863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af1d8545fe901c0e053180989d50b84b4b49f9c452b0dfb893e529dd13391ba. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:54:25Z), 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/QZWFJ2527145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50a1c9f5cd9e6c272e1a3f11aaa5fc36927f48807c494a162abf88a81aa4cf1. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:07:23Z), 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/QZWFJ2551025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ef15ca9f08bb928dcab789fd1c348f239b1ce967bf9edcf7cc52b8985238b9. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:45:14Z), 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/QZWFJ2541115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28666d107c9402d898e6a6c7570fbbf2fee873d8379290b9762edf3152101373. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:24:34Z), 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/QZWFJ2548461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851145b233137f5ec56cf75a9a633ab6cf17d8c31ffcd04b4ee4ecb695554bff. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:24:01Z), 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/QZWFJ2587975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaad213c632c9ad4dcabdc0a19bd4aa1f60274463919b9f3d9a3616362980f60. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:07:31Z), 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/QZWFJ2587983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c7b761f979d650f3ee29f6402d760dcf6be60aaa6ada020e0a15a48d6cc97c. 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/QZWFJ2579720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a3484197c5d80c582e29b2b8e381d9b6c7888a011b6f85c8f68b92cdb733b3. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T08:34:08Z), 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/QZWFJ2587982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613b17c4a7192a26cf192253b26c22e2e3861ea779957ca377dd4e4a61730bdb. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:41:24Z), 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/QZWFK2502630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6f1dfee945621b266fa79ba667ed8159810fac43b6c45b8685d14a1b0c211c. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:30:42Z), 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/QZWFJ2579764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fcb05837ce9bcb005134f48daf95e226b0cbcdfc9d0e7b7dcd0a4ee0f5d0d68. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZWFK2511110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8326c4089bbdad4eacc4a71fc2984c3c3928ceb36d78949e79035cfcd6b7fb. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWFJ2590439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ca3751a07731dbbeb7f10fe5425a861ce62a6e5f2fb6ed02c9a89f2d8bcc53. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:50:53Z), 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/QZWFK2507086.