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 0xa8e1bcea32de353a44ab49b4676a5f4b9f6b00a3e4390818f92f997d2e3cccf8. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7bb24475-d5f7-4ce4-b62a-8b26e8b66310.json and https://artists.proofprofile.net/proofs/artist/7bb24475-d5f7-4ce4-b62a-8b26e8b66310.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 0xb761706980a6337079dc8a475dda87408bab389feb2ffdc357844a6a4138bd9a. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/CNA231601118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25662d95bfaa77f2a5f95e53de07beb6a84ce59dad48dbe1d030779b7ecf776. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/CNA231601117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6f778b31f3084b0dd086e343403dfbae7a4ec1996fb4c70c7b251d22d275a9. 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/CNA231601116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa02962704b7df4a5f12cce6d509c79ae483196f67d5ccf1dee38ec1ff80541. 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/CNA231601129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463dcf613932082439ac08d66ea7efe301e5f8b365785f02f77485f8274311b2. 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/CNA231601131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81ed690c62e5535d0de25fb42ffe3852141d0ff6cac79d1d3b043068e3d2302. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/CNA231601130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823fe92b65a1cd1c1975c12f52707fe7d3415bb4c5e3b98d5d128e12b604b047. 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/CNA231601127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd1d37b211725ffbddcc941abb5eb724a49a13c3ac5a8029458dc6de98f1500. 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/CNA231601126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6703ac82db6a55ed3a89cb04dc20409bb28d6cd7191ba25e68a74907f1fdd65d. 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/CNA231601123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb070c7569d7ec97e0e542c09b5b0cff7655a33e3e470dd4b5bfd437cc84594f8. 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/CNA231601122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa501bf651eb919ba5d81c3b5f3684abf6ee5aa276ef6e72f8ee593e57ec40e75. 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/CNA231601121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a468cf3d07c3defe5c6f20d3b6eeb31b59eb78dfac99e4d33dd50ec5bba8dc3. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/CNA231601119.
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 0x46a757bb973d8cbde77fe030ece46facbc6de18eca8d6e4ff573058bfe22944c. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/CNA231601128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f6fc9143b0ca31c9e209f5e8bac48637569efba8028cca49709e84b72da5b1. 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/CNA231601125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb07b098e7c9acb6bee6672642924ff538c3002bf085264e2f4034f80024ebf8. 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/CNA231601124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb05abae33136ba78fedd3677712f3afaa4ad204e97b9b02e624f7cc5bad5f3. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/CNA231601120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56b7583b30ef7eb5cddf5d32c719e2a5b50676cc87f67f38669faab8bdbd220. 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/CA5KR2188939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289460300162b5d6be29960e8ef3053a15eafe440c70f1c41d06a229741d45f7. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/TWAE31700959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8976b7b2b04a98077399c583b94b76742bd2bb8fc899ec27e484da304602b7. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/CA5KR2188956.