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 0x645584ae7c02198cd2c85c52e0864c23c0608cee0573a047800d0c5a7c999720. 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/d9b0c5b7-315b-4428-8cc6-17ae6c5f1d7b.json and https://artists.proofprofile.net/proofs/artist/d9b0c5b7-315b-4428-8cc6-17ae6c5f1d7b.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 0x6ec6ccf2970e5bfaa8d4a5715604c5622f38309cff44b6a8e7ea9bc53bada3a2. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/FR96X2203126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ff016014513214604d4338cf12021c4711de965e4643718ba89f2f33f192da. 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/FR96X2203131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e12d252ea326076f44208e3445b25df5830209656a581cdce5e860f3dababf. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:59:06Z), 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/HKG732252352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff39d7621842079b32e5642b15c3f0131c97e152cbff6730d18c10324b3bc45. 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/FR59R2298803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb032b7688818afc4318a37bfbef4277d0f1bac3cce393632e16ce344af51d6. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FR59R2298805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813cdff86ac975a5247cd378099cbe14b651e95609da8e4cf7e85e24f3596467. 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/FR59R2298807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b6b38ca7cef251a10fac4b6d131cfb72ab91e232ae13629599d5eddacc85af. 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/FR59R2298809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8fc00a0997c750000f8ea9549cc9ccaf97a5119d2473e9382f90d718f66e9f. 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/FR59R2299214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65dba67899cc11cf486f7744e589ce965d53a8e368c10eba53740714f58c3139. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/FR59R2285806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1b4e1de29110a01cdad12dab23d6b27fe1c42ca6e16f0ae8e2987f0078ca62. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/FR59R2285807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4fb5c9edc7fc423612404f0820c7c09402b044eadd4f922a1f2eb7e3a00ad1. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/FR59R2285808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d14eef53aaac10c95f2b9606dcfff9ff0f91e25670a5ad1880791ca2f10d40. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/FR59R2285809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5689709d05f67b031beee0a411dbb64abf43a214a6822ca24274726e1a927765. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/FR59R2285810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85df617169953cde63a25e0b85f785334fa626b2ec383913fe2ea9be8663dd9f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FR59R2285811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc952c37aee27701e0082e965e9e439eb1d8677ac7fd0ad711b2b1171d3860d7. 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/FR59R2285812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80fb43f0f4b77d20d6961b869a41f828b8e4ae97acc13f5e27c376ea932eba48. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:55:35Z), 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/FR59R2285813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67785ebcf2cc12e1c1af4bc1ce4b11579b0d804740ab31bc3e80e69ef79f11d4. 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/FR59R2285814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b8d32c80af7cd584c6006f3eeec4e6ecbcba8054c0690da6c46ccdd2445cc3. Chain 2 (Bitcoin): anchored in block 957702 (2026-07-12T12:25:41Z), 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/FR96X2203192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3db35441a7a8e27f94f17cd6104e7e0a993b1837288d5973643e74db6b1e70. 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/FR59R2274063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f278f39b1744e1a8417a30f2d5e0970736bdb8d92132ef558153df508c3526. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:27:04Z), 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/FR59R2274064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c6e3425c317d610d729a237f80600cfd1deb21b03ac40103ac69edc2cf2fe5. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/FR59R2274065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a69abf4a52a31c8b3e8035703a375b818c267316e5786d6b37ebc333668765. 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/FR59R2274078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76507cf253531b757b3eca5bf35727601d7f8e58e628c51af966cc0d9f42d31f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FR59R2274079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8536bdeda7117c33f7571d22566f881ba6c80cc0674812f7542e671824c822d8. 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/FR59R2274083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5403d2b641eb3f011f3994bab1c0a3d422cf9637c3b2ab823de88eda982e54. 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/HKG732252366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb14455439d300dab4a83246fe777e9e70bd03abdf88cad583cfdde19b8ba1ea. 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/HKG732252367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530199136e9e6c45b1837f57f3a0afb74a1addf18640ae6a0bb8de4f181f2871. 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/HKG732252368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0fa40cb9d9a740cc68c8c999dae837906fe4f59d1a95bae847fde6ddcb7cd7. 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/HKG732252369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb096685f03dca29f3ca4a65b40d12ea944dd8ade3d4f6b4bf9dc16a97f3a828. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/HKG732252374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd668be4c28fb5a8b36ddfdd912f2ce572e65574d234117bb606d28d808dadc18. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:54:25Z), 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/CNZ352300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf8b2e39f28cd5f23305cce1bafb581c166ed6872121ee6c9c2a0943759a80f. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:41:39Z), 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/CNZ352300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629cff6a425d7f54ea73b196770e87f3de95ad59bb5c877ea7100fc2ac86e3e2. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/CNZ131300268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b9c0a2d9c0be16eb7ad1e734e7ce47f06115eed8eb680a45714479355f47cd. 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/CNZ131500075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511b64a2d326d26e80b20e863ce52e3bab7173323dc01de2052d270fb2e2f10e. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/CNZ352300090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a0418bfb51541a7dc27114bcc97cbe07d10984d1284489ae785c03774520fd. 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/HKG732260220.