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 0x640a8649ca0783b1b09ebbbf04d8f25d3b70b5160ae845a537985cf60b1a0ef6. 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/c6f42c35-a200-4df6-b7dc-9690af66b77c.json and https://artists.proofprofile.net/proofs/artist/c6f42c35-a200-4df6-b7dc-9690af66b77c.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 0x64a9c4bef79255adc43b55ae386739d8bb3b6294a711e5ed56611949ce4aa11d. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/DELJ82016584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbf0eba647d717246cc81a932500cdcc5b19caf0de30bfa3b9ccec9e757096a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DELJ82016586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2f36c164c873ff8fd60ba850f29097b3aad9353619214dcc7f4a4cc1179a4b. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/DELJ82016589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dad93f1d2ac70c855ebafc27e7654735b4850527085934efc4196c73603756d. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/DELJ82016591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a98f91b122a051e763137b7da6454efa47fe3dc974bc0a93a45296c9f83801a. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/DELJ82016595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c565dedd1ff3434c1ca218c99826feb5a0ea123b077ceb9aefa5f5d167ff32. 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/DELJ82016598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd280d19a9d3acde554c7887caa9787081846168d2b7f0d6a0d3b616c78e3a5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DELJ82016602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf5e97209966adc82ec58a530dcfcff14e7bd11f9ac7c577ba1bbcd488e857f. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/DELJ82036737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54e68f2b4ace61adda1c6bd00f08b19eadcb867f5fbdb21bf5b2942adab3edc. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DELJ82036742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0365f4bdaefdac99a2480c4c8a21cbfb47714381b950f12e12c808a4043dbbc6. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/DELJ82036744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e73bf6beb53c7945054440a86c5214cd78e848536805e920e8a6c10867ac2b. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/DELJ82036749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef78e84792d5b0e5597e0b2e3fcef146c146c370e9dfcdb8efd65dca60ee0ad9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DELJ82036752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8df03de6636a1d4a200561d2431477b554e8f42694155cfe20b6161ac2615f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DELJ82036756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97cccc9ba498de179550d878f8cc20a02fc1ad9f122766a0f04f40af880cce22. 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/DELJ82055434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34574ad08c5d777b86aec95376d5c07a2708d0d6fa8c7e13f5286f82f345f759. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/DELJ82055435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c6efcdf78e321935f07cea53879d349e6e44cdfa6c86c84d1c64c601553a6f. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/DELJ82055436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4cc303f6a79156fa78609857ffe49876f71e071cf098207ce8545fdd39a9926. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/DELJ82055441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4f8a4ee29724d0059479e1e399b2ae058ce044550a6b48139c80b9a65affcd. 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/DELJ82055444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372afaaeb1308b6008411effeef089e30f9f06681fc92d15aa9c1af1958cdf6a. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/DELJ82055445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716099f23c94727b5ef287c54a12acc4fee48cec8b6a914076b956a2dd96b5f3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DELJ82055446.