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 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 0xdba194ff830ef50d9b5d5bbf8fc2f99681bf2949c4fa0a5170ad5125a1051c43. 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/2a97242b-8297-4c1f-9de7-f553d677eae3.json and https://artists.proofprofile.net/proofs/artist/2a97242b-8297-4c1f-9de7-f553d677eae3.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 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 0xce2673fef46b44f62a25ca2b661aaba8a5dc3d59344dd640cf9e0f8adc844309. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAGS2394818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1541d2e3d504407ce4d5b1c66d476c4d491594b07aa7040b1510cf028c133e3d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAFW2158849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701c21d6d141b045f8469f70db8481f5782068fc605f60fcf1d8e6fee18fd116. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/TCAFW2158855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa80d01707b9dcf6f75693b724c4cc4ba228f5ae1b2d297a8879ee6c2fdc3c33. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAFW2158859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9355343dab93b179d2f054f63253a3c33c1191537d101480d8870fa45e0cc4. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/TCAFW2158861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5254e2e599ca7724caa9e8b4edc1bb72944f9971353456f99c79158097174248. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/TCAFW2158863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef28905719b67d1f8f7e2eb33a19cf341983bea9b366fca0a321a5729bcf6ca6. 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/TCAFW2158869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316a0c2b2e34f93b12cecf6fb4e980cda003a0551088ddd0f98766be0c685e94. 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/TCAFW2158870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c1c0b8874913774cf9777f458fa8f90655ebcb5252d9cb646f4cccac2432eb. 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/TCAFW2159041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6449c4507d91febaa65bc822f81769b88f6093f2acfeb0aa5b3b3bd04dfa100d. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/TCAFW2159047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6007aa70629c9c9d1630ead09a145c334145170255e87d6f8cfa0d620bb239c0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAFW2159049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40450df9efde0a6a9125a05a3dab68dbd60bd8eb3840d2fc2c7ef5bddceea591. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TCAFW2158741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f69a51bc18682022f15cf912fd55058c9a5f770f71b2b1d707c0626550922a. 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/TCAFW2158749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d03b809c46936d08e3c2f5c74a92a77e62858f8ff72ff99da3b3cea7b1933a. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/TCAFW2158756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224e04e95500f81e737ba7ba0ae5aaf97c05fba518cbc65be089b8effd9a0a8d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAFW2158762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ca7d9391212bee5d6fc808ad4278ca72da8d5dca070f3a62a82fb4441d4157. 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/TCAFW2158774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a6073d25f04f31682716eaffd08deee96e7c93c33a9315c3e4e53699121204. 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/TCAFW2158777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c542954bf802ee102f19b00684672ed022d36115c841a4bc2736dea16b6161b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAFW2159332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722a7b9c17295631ffde8ea1208c7f9561405fcf7809662b5a6c54ee00a0b68e. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/TCAFW2159334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8f9c30c36a934f74090dab3cd729a01bd91fdba73ea4d574c3233cc329f939. 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/TCAFW2159336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7668751c9445e018fd9265e6edee5bdcfb2cabc6b73950a4a6812601cc2e4921. 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/TCAFW2159345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0816de504e5a392d8f7aaed0eb55c51b92438a1bdd9548e8f322ad1020afb16f. 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/TCAFW2171280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117f255e9da69adce3143a36c55df876123acc3896789e6e5054be5cf0e951a6. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/TCAFW2171287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcfffbc45cbb569081364b920b6b7611b9fcbe4ff3f1e9934d7127c1b1a51b5f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAFW2171292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b53207e14c77fff63968c611cdf9a6717b7174b7f5116bcbf1e665b8bcf8d24. 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/TCAFW2171307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e866cc8cfc4de60f833e86620518ecf3fae90c35fadb857a9fd3388e8d4971f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAFW2171173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa308e86149b8d68fb824be3cd6a73d3cc3793c3652da638c1b8d85765a4de7e0. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAFW2171175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09dfcb1bd3e9561d749e41263a78ed8bbf04e6234d88836d388b0d62df925d8. 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/TCAFW2174721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9021643cb2046cf6369df1809d4f82b11c6c8267a7d77608569465f762408dc8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAFW2174785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853cdcb6fa5b19007d52f16afb234d4e76e81bf50af5e174131d92c9f394521b. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCAFW2174802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d7eee6236cb517526c851791a5c9ce83ac41f649c1a9e410371df074a8b9f1. Chain 2 (Bitcoin): anchored in block 957697 (2026-07-12T11:22:18Z), 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/TCAFW2174814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c77e550c4008a636321cc61df2fba187a3a52aba945f426d388cd27d477244. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAFW2178955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df742c3cd77c5b8926cdc6e5bf7362d515fb0c8c9d77063d3ebe97c66c70880. 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/TCAFW2178957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521efe3a8d063d595f24d3b14959c1c06420aed75a4263e8e322d97b864cd201. 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/TCAFW2178702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3f5dfd41c5b065bc3e119c02365cb6d59d26f00f828ec47abf73183dccf82d. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/TCAFW2182983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27382d1b5c2aa141425891b6def5987f78c741a10bc78822c4a078db5a9cf041. 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/QZWFS2419649.