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 0xcf0caf34671b7a6f84f288b21cfd86d015368f8234c88ca3c369dcc625201e66. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb80d95d-e806-4dd0-b574-cf1c7d7d4124.json and https://artists.proofprofile.net/proofs/artist/eb80d95d-e806-4dd0-b574-cf1c7d7d4124.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 0xdfe2f94fcab5d4b0bc152ac53fe79c7ae53a437557586d7fec5eb1cebb0fbf76. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-22T01:26:49Z), 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/CNC072200387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c79ef69a967dab655a5055ae203c8326a425adf925102a5d7b0612ea919a0c. 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/CNC072200385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65bac1acafb0e41dd49e57f6289224fb85f9bd8e6127b814c42c96eb36384b59. 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/CNC072200384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e3b608fe3798cf52de2c00f6dc473fa0e20de47db40ed02b46c4ef025dc3eb3. 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/CNC072200350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fca5ff5034b827acffee011a762ee378b02aa9811eae00711abd792053dad8. 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/CNC072200348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07718ffc64a5765ad438675a0f7a819a811546ef33095f9ab8432cad776b49c9. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/CNC072200386.
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 0x7925141cdcd6ada613fd73d53bb0a0472d348164671860933e22728aace178ed. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/CNC072200383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1de9b27f52e83128275e2c738e1812c30cd2812dc38869f1f2e0cd7ba20421. 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/CNC072200382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b28ea56cca4fb667417074552b06baeb2742647b163a7395205f67d3764758. 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/CNC072200346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6318d85f04c8c7eff63eda552c293512c2b78f3c36856aefedeeea4114d784c1. 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/DGA052481204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2890eaba87de1b138007118cc35f5adbc4e4386a67bad2d404397c6f43cdb62d. 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/DGA052481212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8347a2439722739590e45d5447bd06aa82280ed557da20084201feb1ed2772c4. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DGA052481202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd4bd6c5315b65d43d4a37942f4f27df3e2abffaf3085aca7f788f443dc03fc. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DGA052481203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf3ae274e9f2dc6d8e580d932020666e22643cae3b25f4ef4f2205dbcd78374. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DGA052481206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6dce24ba8c3a63eae6f72ab8487082691ec9c1f4b34a039bd64405c6a59628. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/DGA052481208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2decade7743a042b183533a8e34cab08dcccfb6e7357fbacf0de104dea4379ac. 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/DGA052481209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb07a58d8879e2ad98b232a6aa53e7d55d4ffc1ae96c907d5b880c02aff59201. 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/CNC071400501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cda7fad606c71fcc2c892270c5350a4ead47acd7a46038b9fba74c7d8eb5d7f. 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/CNZ682300062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb04450175b0dd25680f0c434e76ed711723205a8eeb808c2e2b7b6cce997e3. 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/DGA062480717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3483de1e49bf63082d1eba57376708f141b4fce4f2bf57c7ea2f5d829cf854f. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/CNZ682400022.