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 0xc061efb25ca5dc0b658973b24bc19934d3d82e04353a065465b5ddf3fb0c8dd6. 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/b431a920-510c-45fd-baeb-e810f49402e3.json and https://artists.proofprofile.net/proofs/artist/b431a920-510c-45fd-baeb-e810f49402e3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x91a843ef6a8594154ca5033cd41a3f7f5079da2022cbd303e6e7e235b98a1cca. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GB8KE2306113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb3a7955f9f771f8cec4404f2af07372652e2cb37c707f8367ba4714cc89bca. 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/GB8KE2154061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a7f17a59aa3fe682b5f310a5862774950b5f1127df95363b3772415952c77c. 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/GB8KE2154066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43536759f5cae1a4ceecd87827ecf253a6f6eec0cae062295d23146266c72a8. 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/GB8KE2154067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b193c27a08da85d246873466a5c352008254240924b684159eafed3db50d00b. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/GB8KE2319551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95d83c4da14ca4566885c40fe25ce117c7ba0a5b2f3a9932a99de725568ba6d. 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/US38Y2306051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95800e6a6aa2c8a0da18f984cef79cd73f31af4aff6b81eb473f58ea31c5d0f2. 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/GBRD52300145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc84e5ae43aeb6391990415daf9333a92d779e5f6568024cf142830041e0b54c. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBRD52300134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862ce361208c5c862860cab3ba938d68ed5b1aaa54dc0ee853223438529bae37. 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/GB8KE2304956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51dc46ac6f3766ae33d65099d7c1ea478a18f3f7d3c78e12e538e552f55a228. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/GB8KE2300424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35886e94b74ee0919973f9d4222978be157fb3651104d236fbb1a3506e6e56e0. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GB8KE2209850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca46f0ca17a3cb8cbe5e9c426aa7b5d38f2952c1938f54a11bd288b63eeb404. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GB8KE2205000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196b381f142802d7f83d46821c097f7d543847a9c58f12059f6f63e2c72bf143. 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/GB8KE2204745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2d1b49015fbf8a12efdb0b066a1e20d22d53db6228d35c3fc770b12e33bbf6. 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/GB8KE1857436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea57b19d3589ff367720a71252ccf8d12a13110048df01b00f2f81db4143dfc. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GB8KE2200077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5555d25999d9aad244dbffdbdf02cfa9b08670ddbc24f168234596cb5c8918. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GB8KE2200078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22953ba19662dc84d518328f93ff067cd012093edb0d78d3b52fc6b686dd017. 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/GB8KE2162333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d53a1673b728410f3e557ec4a9f826f366f456428a8a7376e9cb4a9e13eb8e7. 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/GB8KE2162610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2f3fd13a825895d685d2e270a037e028eb0d34bc8cf221a732b3de78eff185. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GB8KE2158139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd015afb5d69647f0fd007bb3262f13ac749a7a46e89dc58447229c9eb266dab6. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/GB8KE2056281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7266ac377ae082f1e41f7d6572094fc909ba57e81ad77a4c7436ce56847a3e04. 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/GB8KE2054487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1939c11e9e5ed9ff2067b56528ec933c2f37db9a2c0457def5f05763ddc9a195. 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/GB8KE2053453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805b4e328db7d75a7107cdd4bfdcf444a993a1c7cbf24f2dc026f4e1e8e76cfc. 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/GB8KE2053454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2849e23693a71ea67577b418ec2f43356b55c4d300d6e276882d04e0056eaa18. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GB8KE2051262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417b1afdeb9478d881481ad667fd21ff019e5ff57ca907a0529646adb16c0103. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GB8KE1957128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdabb8705622320bda4ac359125bfc707ec99fe81a965a565bd59afe1149f0f9. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GB8KE1956555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff8a87d1d60407fee0117e1c431c317503fc071488950aaac9d4d4d5f0f862a. 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/GB8KE1956730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4f9bf4c31734f2e8542ffee090f633d978b27a9d0fed758507187c04e99f5b. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GB8KE1955734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a8d8d66b4ddc5647500f208d51655a3826b8d461dd46d60a77442bab3a21c1. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GB8KE1955776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a7116bad4b57eef544270faad4eba7c9fd24ebe3e1ee64e08b84f675658c4a. 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/GB8KE1955778.