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 0x6c2d222812310b493d924ce8796b4403a63ae133c144c78d6cc488e77d86aa7a. Chain 2 (Bitcoin): anchored in block 954580 (2026-06-20T17:48:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b69e2cd5-fca7-4cf7-8a07-f91d960c1096.json and https://artists.proofprofile.net/proofs/artist/b69e2cd5-fca7-4cf7-8a07-f91d960c1096.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
½ Decade: A 5-Year Retrospective, Pt. 1 (DJ Mix)
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 0xf12677d5bb0915b2dbe01bd66568d6de34f4a983443782329c491d2c0db9e748. 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/UKR6V2381235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90934746f8681942491d57a642dfbda6efcc2494503a2039e9d855b84d5892a4. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/UKR6V2381236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3252c81d181942607b712465705a15d6c652e7b7e612516bc10f8684fb9ae1. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/UKR6V2381237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336bcc1713cc6a842030d33dba56572b30c44e9b1c66adc9e72dc952638dfaab. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/UKR6V2381254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b77a1075326e9cd8255692d8286c2a644447c70ae87b416c8a4a4e1a958d18f. 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/UKR6V2281688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f4c5a608d0e9b95dc0c2e473c8fc52c8820335527fa77746265f5319443839. 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/UKR6V2281945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255a260620c7ed7d0dc9fd70ba5dfd93c685165972feafb5b24c69b17932065c. 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/UKR6V2281946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1110f4b68f5360dac34480879a5684114a470c90401937311b85d8bb7601703. 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/UKR6V2280591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35162e5ecc59edf329960ea4b4ba7f5885d572fc98563cbfc54d8d084737c316. 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/US83Z2202621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbda747ddcbff48ae4e0aa2d2ca35e67ddbb885d074fa329c36c08cf8384185f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/UKACT1947712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf84b58c4daf01a342eaf1a25fd25bb15ff37a9b8bc38707d44f1480a4e19ae3. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/UKACT1947713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99053e46a7b11347e7cfce2c3ac2fb087d0107c2034e4fdf338e4d902247d55f. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/UKACT1940886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c43ebb32902f0642f0ffe6f4df340a5e1428cedee2ea4cc39cdf334503f72ac. 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/US83Z1659951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17beab77953ba150ba36d57c423c2c9b43931ade66c24249459191af6727dbef. 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/US83Z1659956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc408cc7c79f3c338f4b72ca67efc3efdef488e71f4c5ba784465578bf1937495. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US83Z1659958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841ea462e0aea25df33fa0ac4f3c642ee3ca114f70205a86acdafea850fc4b68. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US83Z1659957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ec7d05ea393bea325deed26cb6c5468acd94bd000098091091824e2cc3f7ff. 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/NLD681601600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa061d726f3fa9f522b17a44b85a3209e4c3467a5776baad248ada15eee777dd7. 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/US83Z2135844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f10430993108f5ee1886b3202fecb550e6443d94bcd456cdb880aa16388979. 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/US83Z1508770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6f31475589d55e227c0c2e6cbadf07d7e847bea774a1785a8ac2ad36e3ece0. 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/US83Z2140995.