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 0x405ca14be03a20b0728ba25c9fe132501b4e2d9a6428654851207fa45bcc5dd0. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/21eb0700-a52e-4be3-960c-395c1231d930.json and https://artists.proofprofile.net/proofs/artist/21eb0700-a52e-4be3-960c-395c1231d930.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 0x648cf19c3f5489c2c0ab99e6aa04fe361d8378bcbdd7f6f6bc864bb7911a177e. 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/UYB282310218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15b15fb8a9f195300e1a6404ad050b94bc5e8326786b7537e2c6902f3b2716f. 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/UYB282310207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe4e3960b866bbe3ba85387646d470c9d604e13ed4c35dc00b894001e68e3fc. 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/UYB282310219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9c19a59221dcef89babe51b43dc4361694f2ec974a565b6b557f2f9af285c0. 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/UYB282310220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad17e1f7ce92ff276292cf5dc8d39300c98d1bfc36f72615406fd96b702023e6. 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/UYB282310221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b8f5a761c23ee934be8029ec680f7c0f01ac3958142bd355bdf6f5c2ae6eda. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/UYB282310202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55d05baeecacb0844c424962b59ad2b50acc719fa5bf70640186451e45ce58c. 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/UYB282410217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15b15fb8a9f195300e1a6404ad050b94bc5e8326786b7537e2c6902f3b2716f. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/UYB282310207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf493e80d40b9e163411a3730f2f3eaa405eb587541aaf216bed61a1133e50fa. 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/ARIXB2403558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72caa2d8fe8e4265a8681a46104ebbabc1a042985fc71a15d5774c1ab5e3fd1d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ARIXB2403560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48947f84bc2eb2d077cc048299ba12bf7f195c03afcb2c8cf5acbc05bd7f7ab3. 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/ARIXB2403561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25361de1febc242201e18b40b12c3462d6ba72a7c819294ad014e90739dcdb07. 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/ARIXB2403562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2cc7b73cb2afcba0a9af83ee38b04d01e031e33173e50fa5a93bd02063b26c. 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/ARIXB2402873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf493e80d40b9e163411a3730f2f3eaa405eb587541aaf216bed61a1133e50fa. 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/ARIXB2403558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72caa2d8fe8e4265a8681a46104ebbabc1a042985fc71a15d5774c1ab5e3fd1d. 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/ARIXB2403560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48947f84bc2eb2d077cc048299ba12bf7f195c03afcb2c8cf5acbc05bd7f7ab3. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/ARIXB2403561.