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 0xba5907b7af4d16a4e5ca82866d546bde1f5c70e3e69ab9da286bb32e24a2dfad. 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/654a995d-efca-4495-9e85-1a17684c3aba.json and https://artists.proofprofile.net/proofs/artist/654a995d-efca-4495-9e85-1a17684c3aba.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 0x2be036a613f220d520a58711fe32558331ab8782ab203a7adb0481ee615d97d6. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/GX3HH2163610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60a5cac82ccca83855f0df76cc33368ba6eeb45d984e50695cb3bfd3f38e367. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/GX3HH2163612.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606d688346f414021fea2f3b0c045ee48385fb18fa2fab203366effd85b05cfd. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/GX5MY2129903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4477eb4a6668b2673dc8e42aaf8435acb75f58a80785cd4a10e4e590acb99c11. 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/GX5MY2129907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80f911b7f546920e1c1bd262e371d8bcf29e7f9c04ef42ee798ad0c86aa674f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GX5MY2132447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06454506829d2672bd882fd37c4a5fd76eb1ad7a5037a653fce52be9c826831. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/GX5MY2132449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5ee66ee3a2c4de7cfcbc6fe9c87c8df51559bc67ed02300102b50e4d622607. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GX5MY2132451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd018780e66bd95935d8e88ae5067f5aefd7fae6b7e2970f72ee5a0f955898f3b. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/GX5MY2132452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaae3a7f81dd86bbdbc67c1acaec9f04d19676c0e207780d7003d2ab81e31677. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/GX5MY2132552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89fed39f827e14ad4b714357315f53815fa1957536276b5d371171de1f312997. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/GX5MY2132553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe36e9274eedfb14a636cd4f6ee9a98c94aadf587cae22f1f549dcd0175df9c. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GX5MY2132554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3bd29fbb1199bb050ea949ced4ead9a4edd695edcba5809db3a42c8387e6b6. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/GX5MY2132555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2294f2e7fa64b9a85cc0c3cbc35fe5579e9e624c2ed56e6efb0908a30105f319. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/GX5MY2132556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd041d244e61bfd0e4bbf93dc11d2340d6bc9a630cb2207c3b018b0c48b69fd5d. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/GX5MY2132557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0481b6bddc85b0cdf60279de96e4bf497666e6e14097affc8e5169ea9f3be048. 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/GX5MY2132559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ba1bb146bf2d970a78d637af60ddcd6a5e2e5233625b6e3f06f3ffaf78a8c7. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/GX5MY2132560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958a7818e46dc5e7be8f5e5eb897a9a9d594ed22c3f58dcc066b2f7a14cbc344. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/GX5MY2132561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061a413b16a44a7169fa429ffa19e1bb917f1d31622156580cee5a9db8ac593a. 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/GX8LE2475693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa3f8b00a816bfb4c58c2cad1b30bfeba7aeb6096232d5af75bf713af72eb21. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/GX8LE2469487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b53ed520c410bb4e218cdc83b24ca55d1d2002e36d599e04bee2bee6d5bec1. 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/GX5MY2160323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5c2cdd9147815c44fdfb78bb67d43510d584dff6a8ff386c1f7995c21abf67. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/GX89G2419774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62f5cb18ed46769394216b8c3053eae25a62046ac823ad8e6b667b95bd9ffb4. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GX89G2439557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f03614bae7adc16679ef5938553f3b928d1c26c8b070e6df44109d16aab837. 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/GX89G2470063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5d657d68380d978c4794fa0baf47db0bb106007aef88f7446d3059076d3b01. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GX89G2478891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9efb1443553030ff32ec7a4a1d1305bda4f57494bbd4b3a36c16149daaf5c2. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/GX89G2475158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764daf086a21a7b3cb5b6877470125492b76ae9e16da4d1320f36a20ada8e5ad. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/GX89G2463596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a264a3fa1861d48943355e6f4b0585936d26c25e350df5d6385d746ee36c3aa. 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/GXBDT2473199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925f108679ee38d6ee3b0ddb3be7b9f1b3e8b7ce9dbb79c170fdc58768f9c9df. 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/GXF972413988.