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 0xcd46f8d753f3f94f2c4a94ca145d383f85662ef9029feccafc6d0892bba79b6e. Chain 2 (Bitcoin): anchored in block 953730 (2026-06-15T02:47:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/94443b5e-9b3b-432a-bc70-4e4203cbad04.json and https://artists.proofprofile.net/proofs/artist/94443b5e-9b3b-432a-bc70-4e4203cbad04.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 0x8680314a8356b1b4f6d75c4b820460333259b20a5543775eabd250bb8a8538cf. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/GBSMU4892992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36207d4f298d0f51e1071788ecbd085662d47c7fc4b97587acbda497bd72282c. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/GBSMU4892993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93621c0cfd172e527ed61b0fc8d30fb3ffbfc502b9908002a6d0cbafd0dc06de. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBSMU4892994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3866445097f8f329e556e811c6437bcf6cdc95dc9271b866563bab64851b3e38. 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/GBSMU4892995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c914f85fb9de7701c2c185df460d07b573036dd02244c94f443f608b0111b35. 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/GBSMU4892996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77178a2a68895a3022b3fec7263ace60fbbeb0fdfe36902318b1da6dfd56f252. 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/GBSMU4892997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe303f03dfe2fb1217de7319547196eb4c1af372277e63683df8afc18e879157. 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/GBSMU4892998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f89197c35c98b81cc92345537c721342b026e26ce718adc22c1df7fb4b8215. 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/GBSMU4892999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3993bc88baa64c1ccbd5be717448374b31c87de3e63423584cf55b502808ac31. 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/GBSMU4893000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66d8c70b64582b5acd8e21a901d52413cf00c26715244bb82930f3e1e310a14. 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/GBSMU4893001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f7b7e9baa06fd1496d926a2c6a498575d0ec1401af4a831d8e1e344e341f5e. 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/GBSMU2828497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a29036239f773921ec3734894d069e293df9fddbffed0b629a7cabee03eb6f0. 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/GBSMU2828498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7864fe96ef8a6aac6ea93b0648059fda32ea915b5f562ce7764e9938d2aa9d5c. 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/GBSMU2828499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3aa69c55fb287e2b2fab2589345cb46ebee5fb6211d87e8afe8d94248a95b5. 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/GBSMU2828500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22eff5b7c7a862c42f8752c496cb3e3f7277d221497f1a6ba2e99e48d77f3577. 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/GBSMU2828501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a95f3874d922f6eb7b5d3f5fd39e43e76a97c720f1f0396a21c1a54c47956c0. 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/GBSMU2828502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cfdcae1b59b192945d024c29a93867f90e9b61cb43b7f2f0c6dc8fdcd51772. 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/GBSMU2828503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37e32431a59c9d5db6eb3aa65a3396ea5b695e8580845913b038a66c681841e. 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/GBSMU2828504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6402cc2f2928788881724d0458d5b193025f3932b6831611d5e0cc6ea12286c0. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/GBSMU2828505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bcacb04abb3d271445aa604de6df5c13efefddf5c9faf29d5c9f25d817c56f. 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/GBSMU2828506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69c7338b91e485300c9d01f7263570934a428574c3e1184c4139abfc95e6476. 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/PT7ED2200612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2198c7f845cd270623db6e656fa3af3559d9024ff19c9759b3761bba50ed6544. 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/GBSMU8702834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8127144a94738c4fa5fb84def615797b13118267da9a5bce2c4a21eccc69d8e6. 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/GBSMU3807973.
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