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 0x197ca9e3e3c0bd5e3ada12ce1575d67156ca4a1f93b80b7c9e83e460a1827908. 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/eeb9252b-145c-42dc-976b-400ee98d2365.json and https://artists.proofprofile.net/proofs/artist/eeb9252b-145c-42dc-976b-400ee98d2365.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 0xe2c7a530dd3100063b8684a913444f5dca0012b406c48ac786edf7759c7d9b20. 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/NLQ8D2200688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292f0da7aece23793213664cde26c1cb6fc85ba77d1aca02e68634e6bd38993c. 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/ATEK02304133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848b1023e4fb2a56b4fd27a8b95fda8f664d6b47a4f5561ec46af406d934fed2. 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/GB2LD2310075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8b4580ba96449550431d992a4cbd73a4794fa0b7a749ef4528e3f2e6073a2c. 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/ATEK02206124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d1f3835fab8dbeb56fa9fca38f1189e5a2f5f2c0472554f0e1dcb9605dd0b9. 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/ATEK02110106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1777137bab7f044e4d149cd26350a1d6ce9c98756f6acc438840d9e1b53fe0c2. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZK6K2037546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738c51516504a49dc7cf24cc1db3c5b1cd1d85dca2a56cdf4a17814aab7aa4f1. 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/TCAEO1938280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e29f1632895947e47da5b1e4b6e1d54a5719b542766ab93f2e567ed39e2546. 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/USHM21908715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0aa755223ba43ec1da132f83534196ccdd4515a657f5a908dfd12fc939ea6e. 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/GB2LD1800435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda19d4ad616d75f9ac31023bf66f995339e56cca89200308c77771f9caa82ed. 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/GB2LD1700389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72eccee0b7f5b15d76a98e81f1531d3f296dd5b9b40ac9f336325b25cec1d2d1. 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/GB2LD1700269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934232e7fdd3aa1312e91b00828ec5a5f2f9fc39ede89e0b57b4ea63bc01866d. 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/GB2LD1700377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26fbf3262f4cb2622d0357cddec715b654458bb1ecd06b176cc03ffcb8a52ea1. 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/GB2LD1700378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32afedca403b07292503df29e37f951dd1e3394251b0bad36ae946f250c0b9c1. 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/GB2LD1700150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a66d35f7dbb14b34560f5c3769c159dae93d4d4c9af083a14c297e0a16a913. 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/GB2LD1700379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36df1d5da1b9dc9f7376223f902e2f12349a9a236e960e032c2ee4f76ca7c2d6. 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/GB2LD1700114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a18c22a6441d779dcdd7b6dacc5c1e77cf4f58bcb5709e24f3e5a7c730b43e6. 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/GB2LD1700380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d23a635caa4b2babfa146cfcc98054facb758fbc21d191d29fbcc21877c806. 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/GB2LD1700382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72eccee0b7f5b15d76a98e81f1531d3f296dd5b9b40ac9f336325b25cec1d2d1. 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/GB2LD1700269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec93d49d3fbf8320b50a308e94de38b10201d699136f7777d95d545059a1791. 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/GB2LD1700209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa28dafeb724f768554d0217bc3379b52d06587b4f5ae13d77b2dd480b6e6ec. 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/GB2LD1700300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fbaafab5c7f6bb6897d5e7a2ddafd15167e7d90b18d75e83d44d952332512c0. 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/GB2LD1700384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157ef76dfe4ed05439ba2bf8a04c4b79e0bda68f4fa8abbdaf78d30001628e27. 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/GB2LD1700386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3d6245ab3adf167ae93d6593511158869de9a68a024c4131e65b2a40109f05. 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/BCCNG2200361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e914b47f421fb6222b884031144555a42645e43015db46acfae000f72272f37. 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/GBSMU5097109.