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 0x7924a68a5d22662c60a21d231942e7cbfb5ae8e297f1b2df50cc92296bbed5e3. 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/86326577-0ae1-4f08-8d57-ef958989c157.json and https://artists.proofprofile.net/proofs/artist/86326577-0ae1-4f08-8d57-ef958989c157.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 0xd28a92f11268a08a0f5f37974b692034f647f85b106f9a52793919cd162e4ece. 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/CZA232100139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183c4660cba502f176598f0f0cad21ce79af423df715b3a16f9dcb8b24772366. 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/CZA232100140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841611637dc64ad85ad5829287f050f705f06054db7d53248330f7ef0e3fc8da. 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/CZA232100141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a113e500709c6b5421a0fc969330ca2f694be248402b7ab299f3a24c9c3fae. 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/CZA232100142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748edafd729ef503d59bd9d8001ba4ae79028bcd8d148376730b4828cdb46bfe. 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/CZA232100143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b3a54d9446488aa0d194f227e4ce57a637ed80d60e3aad9233f131eaaab141. 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/CZA232100144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbafb4c262d95f7f3f292ffd64ae19d9aa4aef68b520a0c6f3459553cfb353dbd. 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/CZA232100145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba22ac3e26c6fdd18748ed9bf33bca774e8d6c24c6c7d3f9844ce87d136c446e. 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/CZA232100146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdfa137cc594f3ac88331059981001fedda4a552b9fa5f9b83749aa93449033. 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/CZA232100147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9bcdb33fcba9b9ced43a2946a2950ea0728cf1a2030701c3eda989f0393acd. 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/CZA232100148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690a58d3e1daf12b99b688e3b36ea3e2747370bd22ba666d1bac755cccfb5223. 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/CZA232100149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9787347c26fe43a9b1d90ad6c65e5422ccd5b4d8dd4920ce1e28c18dbc0856f5. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CZA232100151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779c92e5a78dc85bf6df6909b1fdb91ef3dc826f2828d9eeca98c003d7b73fe3. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/CZA232100150.
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 0x02dc3e5880a5a524c710b78db0f1b38e6835d1f98d86c1f313442d407911303b. 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/CZA232101099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126f81061ce360ff3fe634fb708a1fb40a35014b6ca5ec49d426f327d89816fe. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:37:45Z), 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/CZA232200228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3bd2f5dffa66251bf81d2e812ced5bae75f837cb96aa7ecc38fe8fb692b3526. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/CZA232200229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea425b2bf86740cd0ce78fa8a3481f673af2cd03005b7f0fb574357c53ee5d5. 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/CZA232200230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4315dbab4126c481856a6d6d2c696d92147d8dc1935e9084888b2178f27b00. 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/CZA232200233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e351d7c4a59df6c07edf521927a5d982ed732b2ef850a5a0ac94f94e867f4fd. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:42:07Z), 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/CZA232200235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe975aab606435d5517d9d4fad3c98484ce226cb267e0d027897e2adcfccebdf. 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/CZA232300725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ee01bb4b0cb3bc98c9e40bfce3ea9c774405e9396e589a352ab436f089de68. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:48:24Z), 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/CZA232300726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65bdeef60d6ae32292b1b30091a8ed89602288f63bd346ee00cca9562b4a7715. 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/CZA232300728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4e3ae46e4b45314a54420aa6ccc9ce1c09d357d6868122a51458bdb1c70eec. 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/CZA232300729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b234bd88b9e54b06d7810f90385d1dc558ad37bcb0be93526529962a261918. 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/CZA232300732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db6ca3aadfd027ad97a3022c3d9f38efbed9e893bd21cc1fd5236d4c3d84ace. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/CZA232300734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d3b78b81bcb1e800aa7ab8b42297c909f553ec50f7a04574d9847b5601e580. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:36:29Z), 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/CZA232300733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ecfdec70107b53c24b4a45779350800110b3429781e3b96f05183a0b55db43. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/CZA232300737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3844517c1e70d1d29790748810b4ce9694abc1faa06106030ccddd79d8240adb. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CZA232100560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c5ba98c26a2d115ba62bded5f14015bea4de6f93a1d42042fb013ba297ca57. 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/SKA012400068.