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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cfddbe28af7ddc91797b1965195b5e0076aa68faf1f90590fa1b8329f9e80a0. 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/e068ae06-b9b9-4063-b943-2f4e1662a5f2.json and https://artists.proofprofile.net/proofs/artist/e068ae06-b9b9-4063-b943-2f4e1662a5f2.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca630ee2966810df4316ef0ad0bc7ec418a0d2d7227af52c93259efeae8b8bfc. 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/TCAHF2342001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef09ee0e8c6ca2096866421f89ff5e00440062b1f1f4e61bb3e26b17178c6dd. 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/TCAHF2342039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7627d1b72fce943a6a2f7852825b182c8cff216ec999311fc49cb34e0a61eb01. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/TCAHF2345315.
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 0x19b4bf11b8041e00992cd2b6a5d107a9bd83dd313f6572bae0f49e191382565d. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/TCAHF2342051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca7deb0c81c9e594224e519496892f53d23c5a9830de2455c5680f938be751e. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/TCAHF2342066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf69e9a473ab1515903c5003b0e87f63ea11a600c401c21bec3dcee419a405f. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/TCAHF2345257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdada36a293285323c61d00dbce9a4254e668e073628aa472e2a7721416908785. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAGG2217166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d8feb7f084b71d5707614fd4e340a59d642c817d9d7bf4a6502dc923bd93d1. 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/TCAGG2276050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85097326dde27a9538955f1d59ad501e4e8883c424f841867b9cd961371bb7e. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/TCAGG2220289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0336491d3de78750c63dc1f841d12838501121dd2339f0e0e9d6a06fa7ad20ab. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/TCAGG2232583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2297706438dfd382d9b7d267039576e154d87c7eb4a1366d8044fe3a853cee. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/TCAGG2232591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9bf40ec47941f2a31e3e5f6f72dbcc9c5335ecd9a56666e72c3178331c83a0. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/TCAGG2276179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066f41a4edc1a0002ef374bcf8f11f3c79cfe722485a9ff8af807d9186033e31. 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/TCAGF2208953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e98dd76b26cd30307816aee9e7a582095ef4c7bdeddd71d79c188065095e7b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAGF2208968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1dfb33d6fd6d0d5b1b1421c0712b4791fed00db22e5679c7217c5c11e6d8271. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAGF2208993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941dd16598177fd378059263396f2ee7ab670e0bf084fe46c51723ab98f8ae7f. 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/TCAGF2209049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35fe0f9f56ec1839aeb08d2d6158c09566893eed0f31a668bfe7d9b9bcaab5a1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAGF2209051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21bdc2c8bd2dc8c84a60da2a672f1511d12ba1f49c79351ad4601aa506134905. 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/TCAGF2209090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5611f22caf34ef08175e33e42b48d918ebcc4d0d6a99b06efc67f64fe1dc7a4e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAGF2209133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233b1face1d9e11c5b12dbf8bed37ab8d1f1ccb832646b61ea87a2bac2aeabe4. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/TCAGF2209022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9493faad86dcd849a52345f01f13742b47fdcb65d588222d9b7d9eb2aeed04c8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAFK2191273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5bdc96c4ce8bcf87d38f9bfbcff52a38948ce9d81b5b6fb2b96a2061d043ea1. 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/TCAFK2191368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b281c5a7a94817348bbaf2015266b0d182c5b0d0fb0e2d458f0f22d187e4cc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:53:26Z), 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/TCAFK2193542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62dfa4286438d86f1a52d1d13c4f4c21c77e0ee90e4a00da97b5ce6e0028f68. 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/TCAFK2193818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6307621196756d6d6e48c32eb3a3f0c353da5a3e56e29f8486908c196d1a0b. 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/TCAFL2131218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94bc802412328656d7540201e1d61378eb704be45b0af86f5db9380107c9843. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/TCAFK2191250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0deb840f960d53b80ab7555c382f7c5358b3fcbc71fe6bf5cb1f3934f402467. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/TCAFK2191320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f239625a9ed023cfca860a217dca225e2939c813c928a0aa8a5a51f6b07bc6f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCAFK2193690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda23760d1ad13a7afbbc056885eaf78bf1c87c1e2ad978deedd213743b85d6ca. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/TCAFK2193846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488620e302599c032ead93430a18dafafba493f85246ebba6b9f60143398ea8c. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TCAFK2191299.