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 0x95c11c0d76c277e0561290f220d004197d824f9b220a4d38f1c7b0957b8fff04. 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/6ed1f3a7-1241-4b51-8d51-fec4cdfa33ca.json and https://artists.proofprofile.net/proofs/artist/6ed1f3a7-1241-4b51-8d51-fec4cdfa33ca.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 0x24acfd9ac398a867818c778c8fd8aa75db2a597922532342083500ba4b6ce4c8. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T08:02:40Z), 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/UKLVE2201131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f7f6ec21c677deb0aa3e8a445e9f7ab4a5bc06445ea8d0bfba260342299381. 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/US83Z2227097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c88d55013c8e8e4e8a82795a48ecc10e558970a4fd8a36f99a0bc410cf5bfb7. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/FR00Y2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd485ab43db5fd8c76cfed1fa52930d933072478392540a2c6f58da5a86f4289. 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/GBKQU2424054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05460e5cf3d3556019a04670a4cfe44f91de3d535e8e29d8dff1241cc5b7cc1. 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/GBKQU2424055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61816d9f6bbf85caf4b2e6d7736e2456de9025d3d4d56f3c923042d7577845a6. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/US83Z2477499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e50b94e4458e5d482c7c1375d5cba6c6a40c88283f62241ebd03020c9437ec. 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/IL4612400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d8045e9283231ee09e45a073e31a3d5906781d2ac20da708f318a4603c1107. 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/USUYG1709549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4959a79a9abd483156c09552746372125a749bd5cf4cf163a4406163dea2ffe. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBSCL2535025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3197b0cffd522075103390a19edd08ac547343f3f0050c57a0edee6d99cb9199. 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/QM4TX2587816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9060d1266cd5f192a405d206556d4097f24da0753a648b79eeb0dcd5aa5d728b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QMDA62556208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56aef73e92e2a4b74cd67d3e9527892e980a074a911609ed5e4c27d607426ae. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QMDA62556204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5495998c433ec8f6c012f03971d2ef9cc26b579ce3069ae058040cb33806e8a9. 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/US83Z2549059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae846d6366d885f09495a321c0d7af078295ea843e03aefa37b7a477df30cbb9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US83Z2036767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc6ec930f4320d1f36243fdfc7ae52ec19fad5a918dc371729fef069f66c1dd. 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/US83Z2036392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff05a15f408a5655a14b92ebd869815173efc9cc4b9ed9a2c3901fabe84aec0. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/US83Z2109777.
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 0xa663386795f512353c70bc6763b3dc5aa1dac110bdfe5af8eed9e981cb4f6285. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/US83Z2139294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14fe6e18fee8390eeceac2f029a184475825d8c3111c929e2628086687a29433. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/US83Z2035143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0f38a29e59b1b75ef9fa67317c249fc49becf0cc76f77b7aa4a6f6a5744997. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/GBKQU2157766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203d3b180464ffef0327f66c46e211c3f74cd3d692e315c42b94166362937c80. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/US83Z2227098.