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 0xd658843d06fd42f94c3c9ea211f490bf42da16dae62903e72c63f2b815553377. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/23c850d0-90e1-4a61-bf94-94489aa3961d.json and https://artists.proofprofile.net/proofs/artist/23c850d0-90e1-4a61-bf94-94489aa3961d.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 0x029ed562605c660f03b69c86eb85e2ea573baf803772808d7895be248726db99. 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/DEXO42353795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e074a23951dfe176d9e8ee34f3fa1b743921a422d463218c326844e9ae0f0b. 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/DEXO42353796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5d16882f1dfd71840a64c1dda1d1752b427829338ecd87665f475d62ca735d. 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/DEXO42353797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdedd7cdd96353a3ea8d34e0bd1f10108cabddabc84b42fca8af8984579a98ad5. 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/DEXO42353802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518729dcc4438a1ca7b457e4c0e29d58f05f4b72c38fe2349891ec96a5c194df. 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/DEXO42353804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45ef00464238e4718cee79de194529c738171f97f420ed5c4abb733ae6e6ab9. 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/DEXO42353806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533769eb3ca3dd6525afa452082c594a3d258009abe26e01448a5fe122128bc7. 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/DEXO42353812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa744dacd53a59a1af6ba1544a4ba5a5d72e28c75cf7db53a518a9dbe6f6540. 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/DEXO42353813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09cf6e82b4a0c1c6e000a33f4f28a436363cfb71030e89fddfdadea81760893d. 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/DEXO42353814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff7e7b26a86a201443f882f41e0dfa35a5879d548a8d874755429132f948937. 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/DEXO42353816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa4058483e75e025f6f72de4801f85fe8ca8cd01ccfe317f0045415368d9bd2. 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/DEXO42353819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770616f5eddaf94fd8c73398f33c70b9f9fddd5170e8c20de44a74e625231c98. 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/DEXO42353820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc729bb7b1b2fb72d67a7329028cd41dfab80c759da2479dc37ad1ee88261948b. 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/DEXO42353823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f988571d6db60fc2cc02fdda5042c06ab24e5dee560688b61744f681046d5f5. 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/DEXO42353824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672f6ed0f4385f2d9a8a66b76d2bc27f9288ed72d2d98fa330edf6a1b6f67316. 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/DEXO42353825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7cbce54a1919d4f74a0b4e7ac3dd5083ec8a55e27ab82628f41cbeebb24d03. 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/DEXO42353835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67bcbc708e6f1b7899c56692f9c51562630814a8cfe61a74e14357865bfd18e2. 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/DEXO42353837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46edbf432fd9c96f03f77bf47e8588186d29d5a8eaf9d57c05b8ed6ac6b9305f. 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/DEXO42353838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b13cfee8964db25934aed26b5558c2776a5494474db25e557aebe78bebdc020. 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/DEXO42353793.
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 0xe422ff22310c66641ae5f3060acc99bb568cdefecc7e919b71e6bd06c26871be. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/DEXO42353794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292478bcb58a455cfc51fc5a2265d7c9c9413f584c3e4acfa175611e4ad5d813. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEXO42353798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d75fb4f45a48c1aa4736c36922d3b765d9b13f938e4d2a0b98ccbcbf3b6dab0. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEXO42353799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205b15d95b8227a8f694997c6e260c2261dd6f41ae1fc32e18166323b1aeb949. 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/DEXO42353800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd970ad707c94344787743ce8dd537c09b9464531dcb7cc3628bd3a941ba0c3cf. 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/DEXO42353801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7e6935fd1294c7d8c90f2e164627ae379053d4d6795930f64598ed9ec79d1e. 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/DEXO42353803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288aa377e746e7f14196cfcd1eaedf3ad6816d79d864b1f967c647c8af97be10. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/DEXO42353807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b04bcd70147c392fe88e9dad6bf17332971a2f99702c46df3c6fce8ce349cf2. 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/DEXO42353808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a72a140b1cbee7efd7ba105edac8e5d381eee73c41961f6857214222675f978. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/DEXO42353809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef65e48d8209efdfdbc8805242dc19131f05fbe94b0a3794e2dfe8e1c8d9f732. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEXO42353815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eab4212e7a13ace1311747a30d5734afb59b0e92c564720f35582379cf81c80. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/DEXO42353817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c95dc3bd1368f4051bdc0e4f1342b2afbc7adfdefd32a2d63adcbe3d2828f7. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DEXO42353818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6af63dc069fe3fe371dadd910df1cc9f2d34a44950d4957f3daf41c15a9ec12. 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/DEXO42353821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfffb876f031557d6abda4f3aeb8c660bc6add0148058cccd7cec8652b9f2f83. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/DEXO42353822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de25b3b4c7c5eca4b559ee8cba05ccce3836ff9dc426c19cd2fdd43e55b2dae. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DEXO42353827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1220a6e25e551f745eea29d21cf0d1b08232bf5960d897bf70034c038fa50d0. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DEXO42353832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2fa61e6d85c1d6624134dc37c6406b63d94a1c16aaa996b9622bea814bdbc03. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DEXO42353833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eead9a594e06517df2a2dbacdd21bbeabedf576a7ab55a29e4e56b6cad8b5cf. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/DEXO42353836.