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 0x65696cdce9690bb2ce29cb14dd4251aab430589a6c72c4c33eb8108771b055b9. 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/b1f5e272-327d-45e4-a17d-c6e48278ae32.json and https://artists.proofprofile.net/proofs/artist/b1f5e272-327d-45e4-a17d-c6e48278ae32.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 0x43f8048a2d700a6695abdbd5a7130a62b16700f32b7c3dd1275b423a6a1a6c96. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/UK6821401243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59c1d5f640d07b659092192df882bc6e7f54bd7962d25e22fe0d4cd5d2ba135. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/KRF252100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe227cfe527490aa588bba29bd7f358dc475112320988536682c3e8c97111ded6. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/KRF252100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83585a47b32dc209ea3fe3d007e12da7af9505437e5abeb4d71d774e3031f953. 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/KRF252100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb775f98dd0e41cf5a1abdb236249be0bda0d8693d87fed3721288be983fb7d3. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/KRA382401547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd38bb06f9a52fc8b48219ac7f092360d75d203a3c6605bb475b8121065a437. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/KRA382401548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebbdb0b741cb0ab60963d95f3a5f824bb0bf951fa1568762b983438a1e5cb244. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/KRA382401552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5db761082ed316632756ebea09a51e3660c85c675067d3b6f9561632d10004. 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/KRA382401554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4d7cd6e7321c30e02352fc58f06ce8f997e039b8b6ced514bc2ad0fe33ecc9. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/KRA382401555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47133933b876924efcfc74abc1522b941ab14e688f4be8c34a1ea47722291d89. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/KSB022440095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6c6512c4e07fb1fff41ea8dee31fec03126845ee7da84bd985e49cc1ee3d49. 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/KSB022440096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3554f83baf6b227e7c8e07a672b2099518d88b39befedcabb43ff68f6ffac2fb. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/KSB022440097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6d611a0822ca4c25dfeedec1311fde7bdbd8155da8cefce686962581636fb8. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/KSB022440099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401cc5e2683fa5678634f084797915aad4226f2cefa9823bbdfb32eed2cb3445. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/KSB022440100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4094fd3ff4e5840f73b1d40d1d51fca7f2615f1235244319c26d0533366ea17c. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:59:44Z), 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/KSB022440101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde213adbdd10d8c27d4dbf9eaab0a20e75f11f37eb92706a888cd85cd518282. 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/KSA002520114.