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 0x4f72d4030eb9b2f3df2d73c2af27b342bec9073c8ca8b68068692871aa4d245c. 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/743c57a6-9d36-4082-9b89-cd904513074b.json and https://artists.proofprofile.net/proofs/artist/743c57a6-9d36-4082-9b89-cd904513074b.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 0xabecfc2bbcff008e76374807ff8a2ed25f6b5265a3f8095ea9c1b42f7427d2af. 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/USHM21624977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cbc55e3a2355d4ae883e1c72ca626e16989e3af8a763310afb8f561102268ee. 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/USHM91732133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc234c7154a7fdf7ab928dcf65717f08dfdf10667ed2e6418d559584207e91977. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:19:25Z), 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/QZCE61819760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aef8800734f224dbfaaa7a2d7f769b2aaffcfbab63c9e8be81d28a62ee56dac. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZCE61879646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1d43b1be8359ec8cb0cc5f9fe5c77796a7c4fee76bac43d63032ae8484d726. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZCE61879649.
Violet (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77bdbf627a713119da005a3bfe0da9a257817c960a635bda66a4244542369f2b. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZFZ42048991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327107c7c449fc552009835820e887a06439292796253e65a877a5e9e5bdbba6. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:06:40Z), 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/QZFZ42048992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8483171dc5bb58ae1deed5cc5afde1a31f1202135d97e25a1cac48f1ab951808. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZFZ42048993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dfbb4881e131fb426cf13b58083003528a3d7678f0810877957e8c82592a9e8. 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/QZFZ42048994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa7c5bb6bcfd4e5c916cc91e7c7907726a09ee9ee518e53ca2540318d25fd06. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:58:00Z), 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/QZFZ42048996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75fb0945cb56fd37454941151c5f5d94a5fab6359811164c95cb70147fb4e33e. 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/QZFYX2087561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177493ebbef3805aa356b553f785f27a0ba446ac91e044ee7beb5727e254df86. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFZ42049000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89796dfa50a9f27c339456bb664739a9439b3fbfa4670b14a6c9511516313ad3. 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/USLZJ2042759.
concrete_savanna (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d514b02c72c3eecc1300fe275e61db601417d12d34d7e59cf7b2f86b082f65a. 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/UKR6V2177289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfddb8fedf23fb26efe87606337fbe1faa9eb6b62f2026e77d059f5fd3f27936d. 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/GBWMY2151350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543d2399e40701e9810793bf4d256df8d57f0cf2a3db4186a680111309a6560c. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/UKN2C2203201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e8d985c9aa6f8c228a790b785e05825e394368356e35b301a94d4d22d37e9d. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZWDE2538847.
Dear, Utopia - Jameson Nathan Jones Rework
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6256db2373472f882f876fb99f5dade3836d24d58b9fdfbc82e7e7e28cc68c16. 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/BEDV42000002.
Dear, Utopia (Jameson Nathan Jones Rework)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6256db2373472f882f876fb99f5dade3836d24d58b9fdfbc82e7e7e28cc68c16. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BEDV42000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8e4609b70730f1cf46aaa3edccf2e3abf19ca90ce9baea0126e22335802333. 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/USXG91800033.