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 0x9d59c79256634599bc5dc3945907ce8ac895a1fb93e60c3814968fe65aa717b5. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0297a40c-eb87-40aa-9f52-632e1ec7d408.json and https://artists.proofprofile.net/proofs/artist/0297a40c-eb87-40aa-9f52-632e1ec7d408.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 0x9982bd71911e36f3f58956695288b84195f0012272582941c59f6a5c4b4438fd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES71G2305389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47545a3c120310d08643d73db83595f2cace0e1240866872192c72c2777f0dc1. 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/ES71G2306257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6bd80e03178592bbe7c9119c87188182dd2f9ac7be362d74c67f7f294f4380a. 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/ES71G2306259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58eeb0aa2a369c64ad2d54dd5bee4c077314c4f687b986ad661f8afe426500e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES71G2306260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03939146307c4b9add9f5f5853744d93693d94ce7e7f10898321a61077b5e45. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES71G2306261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e925d88f004e9b33a8da965f6d5de13d5101a9a09257e0c2b0e4d4de1ee172. 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/ESA092233733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b39cf3fc51d95b7696e25c379a6913de077eacc563ef4dc8ec02a1ee7482619. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ESA012252960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee38299727d6dbdb772e1cdaa50494af2d303f78147093539f8e82f3540a6ceb. 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/QM6P42459921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb3a867c22e1b53b036d6193c879de052b157b7cbda7e64ec196b9debd2f5da. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM6MZ2430358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8edfdd8ccd2e3371796ef04670c3b33f289602abe29ecfabf677cfc5db8e9daf. 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/QM6MZ2430360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42cac420b0e1183ab1c0bd514a6627798ae0eeb63b61e5ac506558bed402a5b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM6MZ2430362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a14888dd6187dafc903bdfa783d75277e34bc76bdc8fa7cf0379b5fc5a5944. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QM4TX2479304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a14888dd6187dafc903bdfa783d75277e34bc76bdc8fa7cf0379b5fc5a5944. 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/QM4TX2479304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d0fe607b131018ffb4a096c34f92127939983a5cc80c310d45fa6c6e312d9b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES71G2149529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e826b2803ffc65dca0cf389b52667e2c365ee13ed3375752b9ab293a1e6f15. 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/ES21A2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e965a5ccd04771ef33fe5fbdce0a5017996454654538d56f3870f59e136ca5. 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/ES21A2400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdb470125f6c051ea50122054cff96e54bdd8bb74477b090d2ca725b2599ce0. 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/ES21A2400056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa416ad8a4fd56fabbc9c978b2b7352fef14841ea5354aaec3e635243b9cde50c. 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/ES21A2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b4f2545aa8eb84c483107fc14c6baaa09bd533b60aab27c08c2fbb9d04d446. 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/ES21A2400057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2182410de61984ba717107147e8db1634d18f5585b99fdf5884e93a7646bce7e. 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/ES21A2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8df5cf2d141473ec8ac2b16e075429b151d458b043c0ebb4fbeabf8c0300c26. 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/ES21A2400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03629ca5be8ace2487d52515f4a335e750f35a423fbe52be2f8e9fe570c09d93. 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/ES21A2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fad4aa29fd15e0fec75c6b7ecf667f8e9dedddffaeaaa4e4d52cdfc9c7ae62a. 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/ES21A2400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399f528004ab72272a306e35672221160f30bcb952f9a31af63da70b313ed577. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES21A2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb9ea13515d3094351fe93ec35434f7d43c54655ddaa107408d32ba541ef257. 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/ES21A2400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15456bb2d8ac2ac2fd3fc5255d95f6dbc8ba65fd5e03749debe5c4b3127f89f5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES21A2400061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee38299727d6dbdb772e1cdaa50494af2d303f78147093539f8e82f3540a6ceb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM6P42459921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81857130245574862b8e9696634a7b32c458b072bbed17b9a6623fc8dbe31f1e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM22L2300135.