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 0x7c85bceeae1f138f07173eae49423a717e75d97d18bb76a1740544f7d90eda8f. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6137b16c-6960-477b-8e82-d177398eaedb.json and https://artists.proofprofile.net/proofs/artist/6137b16c-6960-477b-8e82-d177398eaedb.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 0xbf4b19d7d36a84162cf424afc68e35b19f4c9322ae444c31f14654ae2d149700. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:05:23Z), 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/NL9DX2402302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d35f817664cd3dde9d601ca6bf093c7f1154814df1f46ffa4f437524d743ea. 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/NL4AW2532802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad19a46c1a944549c0628ec5acefb77d9708ed8d3f5a6efd2011b03db03cb6e. 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/NL4AW9902002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4241cdecc3df97be4a604c7aeff990ac6e125e931be7d4f13f46a0b020793953. 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/NL4AW9901402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22594275084a386dddda389e8c21bee00076fd39b72170e7f2c7a8b08190b615. 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/NL4AW9901102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c86ef6da4e3ce99e98f5ab8e9b2d058ec37ebb5e569788da57a9927c937cdc7. 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/NL4AW9900902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27aeecbbaa0b493cef9068cfccf6402fd5d6d605988c57fa0edee7f048ec424b. 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/NL4AW9900402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6dda4f73fb87d6f93ea259d8503bf1551f5ec4b64a474cbe3015af6fb4f195. 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/NL3TA2432302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a3770dce615b5270f13c53601b28805fbfd23c48ea49383077f5c51095bea6. 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/NLG3W2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654289d9d2f52a391b461810fc547366dab5d803529f49b921a78bad2c18af98. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLG3W2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54259f75ffd4f23eabd801f47957e5954980123669ca9db8b02ad00906caa3f. 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/NLG3W2300248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20d740b0bb97ec785ee155d21c303c9f41aa47c596ac28a5573c74cb2d29b43. 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/NLG3W2300252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0b2e3c3b88abae3189afff6940fe94c5f5124c010c8aaf297422321c5390ab. 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/NLG3W2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2c28f720a397b3c653237736ad06ddbddf138b351aeb1840e9bd54cc23af0c. 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/NLG3W2400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e93aeb8c96e76363a70ec09b5f3caf79343a03113d13e88c524e704e7fa7d44. 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/NLG3W2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5859e9949a62a354f5b2de5c5d9d54b485fa64726abb5334cfcf58c381cd306b. 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/NLG3W2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3772d85d995fb2ab236383dec0db2b71ed1a486ca8e9659e3f5ab0e848bdaa3. 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/NLG3W2400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a0be278eaf94b02e81b31da186e3465f8c92c88e593bec5b0325c97d720f47. 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/NLG3W2400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055fff75728010b4fa1918d5717989a9948f86997e94efade315574df3c3e8f6. 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/NLG3W2400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee52d4fc07ef35573eacd9a26d7096739ca59822110e5fd573cda05c4543f5d. 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/NLG3W2400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd025549e91e5f768ad2db38c8d1cf932b30f22a980d4f34cc0fb778632ef316f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLG3W2400057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00acbbae4f55f1ea11a12b43fd6a97163c5a904cf50fbca618895d0209e5f3e7. 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/NLG3W2400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe3652d3dead331659b1dbe64f0ae22634e198117429d9d5eeccdd24e616d67. 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/NLG3W2400066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4980d1132cb6a7c45e3765b8437c34b5721d2097c2cbb2ea8f551c697a645a35. 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/NLG3W2400068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706980e926f8999f093b13cfb865335b0373da9c38c9b70e01d61f035a7afdf0. 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/NLG3W2400070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957b4fffa4b4396eda46168e9d076b12de95cf40c5c5fc21558245c2aea2ac79. 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/NLG3W2400072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82a5916eb92cdfc782b8e51f7b495a63e8d52e30e9b982ff376a902a8cd3722. 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/NLG3W2400051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d73b715a119917ccbb0b3a640cc35e86fd7a62e20a52e6f629c15cddf78c6b. 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/NLG3W2400077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5ad7ccc411a55ba891bdb1dc2327155858b17511e7d137c09c905adf88594d. 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/NLG3W2400075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823ab2dc2b480bc8b943c6512aa39825b1360d1bd6cb60ec9730d8e05b50ac83. 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/NLG3W2400088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a239efcb8b324c921fd5a73eac4d3ac65da6ee3a294662b6b269f25f1a3d1ba. 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/NLG3W2400090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd79f14211e2369d930e014438722c4f4d8fe96a39351c0cf1194945c5a54ed. 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/NLG3W2400100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef9944c1ebb156185e0d1630ab9a777987bc2b90e7f61f3f58912bf2b71fb74. 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/NLG3W2400096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693f09c08e5f143ac2edef25d3f3bafbc88a9067b132f9f86a7ad16c06932f6d. 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/NLG3W2400105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62bd0db2ece2af34d06dd569d72dc14e5e37c8f0c68d94d46ea3e418c9bb629f. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/NLG3W2400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e0c81043a289a9f33989ab80d0fc19421bd0c65bdb06532ec3292af25ed1f0. 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/NLG3W2400113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2174b3ce468c20f599630c413f6aeb067ba207bd78abbda16a07e04eb3e6b3d6. 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/NLG3W2400133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde31d2f447b89b071c500f0930de487194a73257f797d3ba9b6af4f357723e1e. 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/NLG3W2400117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7e360a74362f1de3fe8e0133b001843fa79745c78678161cda1b9ef05cab65. 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/NLG3W2400135.