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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0a528c35676e6f66abe2979b49921b4a79f912ba4c9ef9b022ec37ad2ce424. Chain 2 (Bitcoin): anchored in block 954025 (2026-06-17T00:32:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/38c6f180-0a7c-41ac-99d3-3b6ed3213a40.json and https://artists.proofprofile.net/proofs/artist/38c6f180-0a7c-41ac-99d3-3b6ed3213a40.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8859fb2b6049be94607df18b322ded789dfebd3ea15f8c8c44e537aed83148. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/SE5BU1948580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e31c8458431a5fa4bb1de6fc10f5202d51b6d5ceead74a0311a0e8d28dc9be3. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/SE5BU1948581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cab61fce6ad0f955e63bdf15f8565ac540bd3b424ab5f1f9751ad99a8b0f53f. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/SE5BU1948582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2bb932d21e1aef7a2e970920ed794d990e02e2ba7da933b2623438fb9be255. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/SE5BU1948583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d97116e47971da3011c3d59638a9711bee30f3529547636a553f88b1d10dded. 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/SE5BU1948584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932f049fdb6a310caf72ba0f3187f731e558aed634adcdd54fea1180bc6e02e4. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/SE5BU1948585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0491b0c1bbff5e8405c651242310c0ae06be47f0095cd3e135b99c2498bd58a9. 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/SE5BU1948586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66963952f9217a22c937ae1d9d7a89bddc26b59852c80824ce8c220d8c84a8d3. 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/SE5BU1948587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582e70f7cbe9a7c5b2bbbcbe21fe15ed31e9d28e49f31a77df4a0c8711b167ad. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/SE5BU1948588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc417126a31ddee9e5bb35386e2c503ca96ffed31a665a8d40b14939a51791b18. 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/SE5BU1948589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1ccafae573ef04080ff7f5f3f808214b352331ebd1a94f13a62bd7599cd7ef. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/SE5BU1948590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99f41c77e45ef6e6d6cc01b0bfd2651434c48f41767a09eb82711c7ecec538b. 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/SE5BU1948591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e0254bea4c60f6faccc5a329f836e8c11a4fbfb2bc776c496989800a4b9a9e. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/SE5BU1948592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042b7c6ab6b75d94d6f3ff8b95ca862b13fb295e86e19f3200a331d55fce8077. 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/SE5BU1948593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463e1987be343e55bcedcd85d528c915e886a6a0ed44564feb472bf7b86ad438. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/FI3CM1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebcd87e20e90e5422f5e17df9c00eeb319f72584468fccaab81940d7c46731c. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/FI3CM1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08d4223681779ad7f1fffdd6c05a557d0846f8d2260cacb3521282ec0553a77. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FI3CM1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f250daca67afef6621576d699e8bac7388973b8dc387a6dcd6c863d4c877ef. 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/FI3CM1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e28a96cb1fa7396ae19ea3028c3c4aa619c64f667f0602d654593b3081d4fa. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/FI3CM1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4bf581e2eb56386758f04c40008abafa9aeadfe4a78af7bf53591e41201793. 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/FI3CM1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99bdbcb70f77750159f0784c0c639d5e4e260d92a85a28d21b4407440f3033c2. 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/FI3CM1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca8cd56cae9680ce710058bce8e04be8d5274ada6bd250be1e672572e756aa1. 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/FI3CM1900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68bf3c41d7aba6e17b38a867138b3813a51c14d49f9b21321e41a9f31a8fd96d. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/FI3CM1900012.