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 0x7078610003d08bc603ce984c321f34a0220d1103aca4e0828fcd03326f51c75b. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a040efd1-a348-442b-9627-61aa2a2533d6.json and https://artists.proofprofile.net/proofs/artist/a040efd1-a348-442b-9627-61aa2a2533d6.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 0xd90ed390b1ca54f47084295b388f94739d1e2fc2db29d6d3ff9b094907d7bc00. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/TCAHY2488268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5c5499e84bee156c624b30a4b53551d710fd2cc64e221748189e801f10b2b0. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/TCAHY2488271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17af30ae2a4d5c946cf3e38daf63ed1f55421b24a47d9810647ac70281003b24. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCAHY2488272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ede562982e8a97457cc4ac2126fd3d9748ff1ec6eb6bd049c0d54d6df72e2e. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/TCAHY2488277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc123e46289f900e3c395355a440f42f85457353e5ddd47dc013d2a62cd6f93f. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAHY2488289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8364c056eeee405f33167a61c4d65f081be18a1910738cd5a2a0622314474dea. 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/TCAJB2407633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53495a03333f4881b7a4695756f69ecd2cf4008697161a11402bcc6f24b51c73. 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/TCAJB2407637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e903b1f3c003adc015b0ccb1c4862ced4ed65bd9664fb5c6753df42172a9c58. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAJC2407642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6e8be8aa0c6441d6342447d0e0eb47d028ab5f723ef6d4d85d5883a989c563. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:01:56Z), 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/TCAJC2407644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd17748d5fcef0df3f935f6022f8b6203d2b8ee8976f14fabb921b96001550fa. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAJB2407649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60608d34095966166eb3116883a5d08bc29a9b5491b85355392720a1cfe943b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAJB2407652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaabd47b04d3d7411775e29c6b4f1b648d4c5fc3a4ffbbdde1243edbe20be56c. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/TCAJB2407654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97ea767c2e74ae3f50ceaf45b275ec44365df0e3b1d882206bbcb3ade44b5ca. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAJB2407655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a6cec69859b3b9e098bc5626faa7a39c458a3abd9a4f34ba59471a05b1b004. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAJC2407660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3cf0908332eaa6f34782bccb20f4615303a69df71418c2efe079e399b99355. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAJC2407664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344a170f56bba722eb695b404764b5fe032e46d99a234c60d1d58636ad2d0d94. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAJC2407667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86388bde56f160ce98efd6416305811f54714e5f86f9b85e3ebc1ee8c8d180a2. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TCAJB2407669.