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 0x491cdd942ad8dc2a832a645efbf60133aa5540c0dc97925ee5cde6274b08b922. 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/13af7a0d-c44d-4965-853b-9ef72bb6d22c.json and https://artists.proofprofile.net/proofs/artist/13af7a0d-c44d-4965-853b-9ef72bb6d22c.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 0x876a2c737ed9bbaad6d22b7a78ec96de48b832f57ed8956c0766d4968df058cb. 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/GBLFP1575284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c531989ea0019ca65638717a6c1a60ee721f6aaf456b1d924573326e53a3642. 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/GBLFP1578112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b57ae37dac5eb5bac3dec370e2eb42062c620a851975f401fc8715d72ffb4f4. 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/GBLFP1575288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8ed6ba0d78d3db5b4abfdf650d99b10740386b2ad10a63d71ef4feb6d16143. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/GBLFP1653276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8001807932ffdaf2fa555a07253206cfc782712a2e9036094d402eae3bcc30be. 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/GBAHT1700761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe719905daedae86db5343eb43cee3a985b02150874ccb4c7aa1d71551eb86e1a. 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/GBAHT1700762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0628dde98819b3bf325b5642895132eda4919bb10d92731d6077eb4266f78aad. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GBAHT1700747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f8d709f5cd9dfd91349aa2a39b342bb21010cef5b330f429cda16ccccd75e4. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/GBAHT1800719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c5b8cf5232939c9e60ff221d78cda1f10fff453ce581408ca1edbd6416d727. 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/GBLFP1954574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c4626813463acc8e4b133afb4533b1b00b9b69c5a6384a4a094d575d08fdb3. 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/GBLFP2046514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe78aee2717afa49d200c93c499a1f320eb11a17d7062a89134fa15766e12af9b. 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/GBLFP2046516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67d6c564bc90f94c9cae805cc60a5939528f0db56d72a1702fc247ca6006901. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/GBLFP2072221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c4626813463acc8e4b133afb4533b1b00b9b69c5a6384a4a094d575d08fdb3. 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/GBLFP2046514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d384c9a9aa336c681db682a89adb0fecda8ac1c6bb57c5b83ffbd9fdf825958. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/GBLFP2046513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102e57cab14a6600f60d70e616d202d0e5da88a876e8da590b80e13b98488040. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/GX3Q92097930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457a9b18c9563163d9773869127e768ff781a97d976b378bd6801eca77ec296e. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/GX3Q92097196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ebff914fc84150728450458ddc51f9c64e803171cc649a41944d10eae0adf50. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/GX3Q92097934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e3b4dfb5a3ad9e16fa99cbf5515b46108240ca0526321b4ba10e5add839d66. 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/GBMA22332739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7420bb916d95812e05d5d601551962d8c936aa29d81a490c5ee75b545630154c. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/GX53U2353382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7420bb916d95812e05d5d601551962d8c936aa29d81a490c5ee75b545630154c. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GX53U2353382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d75743e45707d403a79a2969e7a6494437768dfdf9ff8277b4034956362e79. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/GXF9Q2477563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9af574ae894df3ab40c98bd2d838e7881dde89c84d2b944c95fdd8d36afb44. 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/UKXN22568328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da812c0fe0006d2b53a547f1dbe4b1f34c1ed48fe473485ac0544451946a39b. 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/GBLFP2550587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e135d4d8aca488a5a06242b70a72abcffc7ba81fa8fe9cfa4a8317c2803735b. 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/GXH2J2536683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea007ca657f549562716514b3a4db30bfa6876201411ef324bc6bba323226dc. 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/GXH2J2536684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c60b6de40cbc6d31ffe10eb74f367bafb749fa53a105acc2e39ee2a3b516e5e. 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/GXH2J2536685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44fa66b45e1ab3ad34d694187f52e6420a5b62c5c6376abe59ae5176d9b105e1. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/GXH2J2536687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2f246259c4c2265598d6d7dd51f2c207e9b5fbccfa373dddeb433356a07291. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QM24S2201742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e5f1b0908f08616c85cb4abcc603f15590d544ea92464461feb8399a5f1ad9. 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/GBLFP2040242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eeeb342e4c1771cc9f83ce9ad687bcfe50be254697972925b62f7ce4724d974. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBLFP2041179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e1818162efa4e6f5861d1035b3c9f664dca96551fa288488d0a91a44322d74. 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/GBLFP2040241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb0043e8bef8786ab8087124f7b30e8b8e4711e1c729b4731af50bd6742a798. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBLFP2040240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb0043e8bef8786ab8087124f7b30e8b8e4711e1c729b4731af50bd6742a798. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBLFP2040240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eeeb342e4c1771cc9f83ce9ad687bcfe50be254697972925b62f7ce4724d974. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBLFP2041179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948f5c6d60e8c010263a97e6498ef656b4a14008f239fca20664dd574a8c0b8d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBLFP2041178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948f5c6d60e8c010263a97e6498ef656b4a14008f239fca20664dd574a8c0b8d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBLFP2041178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f719c3b13e1c66cc9736803c2b0a5346da4f13cf1821c429b4c3a548a8c2bd0. 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/FRX282455684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f719c3b13e1c66cc9736803c2b0a5346da4f13cf1821c429b4c3a548a8c2bd0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRX282455684.