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 0xfe4ed0ac0bf2793c5f0b8b84888a85980797a1978829e88118d0ba6044a9da8b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f40e57e4-a67c-4de6-b39a-01d82e5bc39f.json and https://artists.proofprofile.net/proofs/artist/f40e57e4-a67c-4de6-b39a-01d82e5bc39f.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 0x8fde0125f7598626b0f0f60527f671ca7786d477ed84334ff51205a941451d31. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHZ62229011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf99b7f8c733da863608d9c74e7f44fff8bb703ab3543b322c75cd926d650f31. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:19:44Z), 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/US7VG1686650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab84f93e1d8789fd376ab32e61b416a26b597ce8569bfd8049c6fd4d8b34c52. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US7VG1686652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b66b9bd4a1ff6b4bfc031ca4ca91d497378e9e5c975738ffba688645affffc. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/US7VG1686653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3500878c0cce81bd79faef7af64310257bade8efed4d99027f68fe6855e049. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/US7VG1686655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6b348cca945b565a1c844baa85c62b3c92034163e6892c92d6840c7ee80e0b. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:47:26Z), 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/US7VG1686656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4249b4e3625f5e4161345a8a1dab5228050cc8707696cec04cf33a16daf507f. 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/US7VG1686657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282125378cfe0d630f43c157c38eb81e4e3eb6132514e6ecb35a330dc4b1b5b0. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZHZ62290326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892d112f46d707e0355b00e0d754d991464196762cd6ba6326d77a55e51e9f7e. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZHZ62250132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3773e0c5cb0465aa68608c630dd601e8c57e3bf1130da2da226f86c37927201. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZHZ62250135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2017b1ab2204d9973e7f1d250a8a9fe1daf50a9fe8d7a7e915d63f2bba32adc. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZHZ62234481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008b77cc37610a3832c91b266258e9611b9605b80c51988133cd5e91929921ea. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZHZ62234482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cfc603cc68299f125e9fc702905660e046dab611c69148469984893bbb7fb78. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHZ62234486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704f0f3568b0ffe73b8619a9c3e0be8b4d71e398106615a21c744a3d6476f8eb. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHZ62234487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2f8a6b06a54a9e4efdf3fa80c275a19ec9481b63ac0216ecd2f28f960453c6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHZ62234488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ed0b454b8fc53d1815e43998601d18a492977bb4f2f6af94267ed34b98948e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:58:50Z), 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/QZHZ62234489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13286e4ac5534fc350baf25629362fb2c60b10d46cea1337506fddce75847ea. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHZ62234490.