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 0x091b20206e2d6d91048dfc5c2eb80f89e9699b75ea3dc9502a7c2811cec8d2fd. 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/76f4d32e-c23b-483d-b3dd-6f6e4b6810ec.json and https://artists.proofprofile.net/proofs/artist/76f4d32e-c23b-483d-b3dd-6f6e4b6810ec.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 0xa03d54bcc95c0ac50959431353b1cfc042086b83391c4192ba9557d2062a3adc. 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/SEVGT2000120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9de310000ceb91a4b8fb6abdef02c47e99f5db4c93a5f9e21e95ff8d772dd2a. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/SEVGT2000251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a2a8ed5aaba6a418c08b01b962420b2565a03f9970f3c5de02a9e697129993. 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/SEVGT2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36a58cdf3d98d5eb81141caf49559fa33ff73ef8db081fe7608812bdf270955. 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/SEVGT2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ae473ed0218fdad60ee4d04a8faa41466cbf500ab1eb4faf77741533f98059. 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/SEVGT2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804e0883add1598dce52a01e38fcbb4c1e8525d33a36a20745cad3f29c54c4bb. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/SEVGT2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7e5ddf40c547fd7ac3c48cc5c1a8019ba3562400272277c2950745efc803a1. 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/SEVGT2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aca55dbf23f814269b23c30f3b6304922423b9b5996f5ea82e32b24a6a3beb9. 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/SES632100019.
Bus och rörelse med Minikompisarna: Klassiska barnlåtar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9cf03420df98b107b37385e3f03fb411af8154c82814d77617f4b8d2051e0ee. 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/SEVGT2100046.
Lugn och ro med Minikompisarna - Godnatt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a34b450acd5deae8a1bafbee325138989a2165bc50487729a7394d1ffcfe826. 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/SEVGT2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33d9514e3de99ced4a2ce691c3d4293bb01cde70da02f281f258ac1a69d19a1. 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/SEVGT2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11fe310f7e7dd86de887a46d99f4c467b5be186b00e8371b04b962c7df8190ca. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/SEVGT2200209.
Gamla och nya klassiker med Minikompisarna - Barnmusik för hela familjen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796ab03507c77680161766906d71f646b5970e93834dda9852ecb642c90dc827. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/SEVGT2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2c931f7321db3cdbdbbf12376d3cebcf3329af2aca79116f08286674ac9c3d. 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/SEVGT2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e283e5e5cccbad3383badf863c8bafc15b34d4d0581a7d6adc5b2c590edeca5. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/SEVGT2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3ffb2f3d1c994c19db656b4722295285743a6156fb4275cf7a83b35ce2917b. 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/SEVGT2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0158ee9d244a043889fce0e72b1160a89ee27be1c5ca3d02d288d5f575785f1c. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/SEVGT2300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f95dfd0416fd0080f95efa02329a711b876a6236dc1cd2b91f61df8fcf27199. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/SEVGT2300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00eaf93508a9201cfcdb89de701afd6b57cbe0ba632e2ac14cdcb3a3ddd2bd59. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/SEVGT2200286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960fb0c4f9f0bbf04b7b8395db8c22f2a0e65dbadc1ca7791f83010999d1692a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/SEVGT2400112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51618ca7c09071fd83b5c1c4510b90c9f6dbb74ed30b897084bc5a921f4caf17. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/SEVGT2400114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8bf37dea501812e25580e4de6838854e8639fa7e414ac8bcedce45dde0a677. 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/SEVGT2400115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c03fcf39cdc8c0838b4b0ccfaacae41bc27924015a29ef5f9e40f3c3c6f9a71. 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/SEVGT2500038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07500c3ffa55b8eafa9330cefaa0cde372de20056acff87fde02e03a84d9eb53. 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/SEVGT2500041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463c4f384fc3fb978010302991cee2607c074e30739a7d51b9039e909bac5a5a. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/SEVGT2500043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03dbd5dafdc4033bb6a4cf6a179a8d36b856a84fe121a26cc2078bdc89ec99b8. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SEVGT2500044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51618ca7c09071fd83b5c1c4510b90c9f6dbb74ed30b897084bc5a921f4caf17. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/SEVGT2400114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5137277d6eb93d9b9ca4d541ec49cdfb25798bd98cddae3ccf7bf575cfb5ac. 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/SEVGT2400113.