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 0x34326c30855f873f139253531243e413af9ed45dc5d866150751b8f2e5b3b2c5. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4ee86890-d59c-4c02-ac8a-11c7ac36be95.json and https://artists.proofprofile.net/proofs/artist/4ee86890-d59c-4c02-ac8a-11c7ac36be95.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 0xfe8f2f7b48ca8688bad76d569ca8253d9109e5cd21c23634e3c17c2c00c5dea8. 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/TCAFM2116835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6db71f069fb61cce2432c0c3f78f025928b566b4baea0c67a39563e56b1a50e. 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/TCAFM2116839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74aa653a98c2375f0077bb61e9c6f9235dab73af197b7bedda0a65d02d3ae19c. 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/TCAFM2116858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44599a3aa9f3cc11100cd447ae6b7d268834b6cf6859e6da41bb821d0610dcc6. 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/TCAFM2116865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6eda1db8be9be00230ef982241f2adcd6507b6af97821acafbc6a054a2908e4. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/TCAFM2116826.
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 0xa402b6b3c29a08c023d02f89c025d802cec22e43e9667936f62015b11f2ee9dc. 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/TCAFM2116831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21fc8ef33f83ecb16fa662d3210b3bc5ab407a22d96acdc517d6234dc3a277ea. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/TCAFM2116842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eee1be447f2d1866639186089f69cb08cf33e7f374c188e8907b7b4d1d1b453. 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/TCAFM2116867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e40f49d8d59a3dbce187a4447002ea71d7be78876455cc92cf41cd803fd8847. 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/TCACM1695083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17bbebdc6e71cff41f9efa9bcbf5955cf31543bb2c8cb3560d43ba6c6c9e37ec. 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/TCACM1695099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd579e18a5dd5a49424f3ce1d95db882b4c069ce14e8f328390733c71c5cfa6f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TCACM1695102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeafa2313fd1394a91a20466f769fd1befbaf0af4165da1d6e7bb914479a1542d. 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/TCACM1695116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da616b2b76880970db2f754f82cc2647dad7bf4b9be3477512096999bb35e3f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TCACM1695118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0faa217c9a2183503ae9ebf099a5fe19471286c13ec81cc7987ddc39e9591363. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCACM1695121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d040e0a45fdc9ee7868bd7ef6ea15a158785ab743c5661dd0ddc60e8e714c90. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/TCACM1695098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57e79b1846c16081f4a716d8d1daf70ba5ed8f15a14adf849ea536a8cb19ea7. 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/TCACM1695113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa36435ec087ff29170d530f95078fcc6cb8cb1699cfbf666027be22c3676763. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TCACM1695119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2d7b0c85cbdbf651570bfdf029b99716200980c7f7a8bc5fede50e3fe8757e. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/TCACM1695125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f6497a0a456f97a4f01434b0b4efa2fb5570ae618ee61dc8898b16957ec587. 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/TCAEX2067336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22e8a02b16ec88fef5c37c55729335790460ec4ceb964f8b3ec52e29df6cf81. 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/TCAEG1931004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d4418d7777c2fb25b8b7562a7655146ca64498ef555fef7ace88b2fdaace27. 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/TCADN1865673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a79556d9067390897b7431009c54b753f99a04efbb513eeb0b5d0be2790f61f. 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/TCADG1777477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde41960039ffeabae4601584e267f3a42e0018fd8063685aef3111794bf37375. 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/TCADD1718835.