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 0x5b5d54b00221cbdaf0434ef1a6c7a4f3619a6d4520d20588a1e8f70ed4faa481. 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/bc4adb2f-d879-4fc9-8e30-2d2c75654614.json and https://artists.proofprofile.net/proofs/artist/bc4adb2f-d879-4fc9-8e30-2d2c75654614.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 0xe4713aa416acc28a2066f1a486183f570cfa0d4a6e9c1c9018e142cb0af3b250. 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/GB2LD2320351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e4c22acb6da0dc17b693ba3b619c30c0feb57fa2c273639c99f1ea2b35b0a3. 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/GB2LD2210412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9fdc7bcdde03fe0af56bee758ea9544672c2f052a4d0756fb87774e60b1da4. 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/GB2LD2010257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a870554c8ced2ef1b0f8acb6390a7469730de12299c4b2f93f34ee3d0c9343. 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/GB2LD2010256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e562aef53eaee0305baa1cfa8fd1837525002c91a1437f0aac117bee4981ce6. 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/GB2LD1800802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05fae6cef230663c63ffebb99ecb4faa7cb13f8368b05ebc0c086fa42651678. 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/GB2LD1800803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5bd68b11a8a130d10c5a672f4525d2f48e2bcc87c6c261275804eb76a3296d. 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/GBIGR1843001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366044f30b4a8da8eb6e4625b29d66b90c139ea615475369e82cbbe75338b5b4. 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/GBIGR1843002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x783117433f980e97a4c30c0ed2ed900e890578cc75000453270346edbe5f69ce. 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/GBIGR1843003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373c5011872f1adc867b0fbea0dcd056001f0ca774cc88cccb2dbf712e77b7ba. 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/GBIGR1843004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bef9cf8fef80105349743c744d352f0de9e4830b120431ec349765b828a4647. 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/GBIGR1843005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89490f8aa1e084526b40358d0ede4d2e62f3828173f935909a3b5827db9a286. 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/GBIGR1700201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e145b5c899b9fdc20216131882372b79fc3a8d74089bb3710eaad03dc95058. 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/GBIGR1700202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb92924aa67db8ecd7b89419e30551f0c9ac89e0eb9630283191f409a00ae541. 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/GBIGR1739002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8805c569bcf6226d4c0d5f9c31f5bf3cca25647836c001c36411744b939dcd58. 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/GBIGR1635001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66e574579d473819017523cdad06fb460536084528ee0a1365fc8e7cecae17b. 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/GBIGR1635002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372c0c1ed7ab6d77d1c47d68cc29d59d3cf68f74552ec64c60db29dcad620a9d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBIGR1635003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95ecf3143a961ffdf53605bf780a92382ebe55a542705dacf1bf2c85571ce1f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBIGR1635004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47164a6b2ff1cf654d2bc1ff8ad6e2ef1fe733ef15b5d6d8071cfa33cdc30c00. 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/NLCK41042884.