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 0x2a219ebb816ffe6612c2eb9beb9ef918f45c107dcf13cc4c66c58a957a485daf. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0ad100fd-e811-49cc-acbb-67f59d84f301.json and https://artists.proofprofile.net/proofs/artist/0ad100fd-e811-49cc-acbb-67f59d84f301.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 0x39ed2b575c016e45ac669d0d235aa8b4372331f43bcbc032850120bb65f03789. 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/TR0330601882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619f5b3ceda9a451f0baae5e53c4c9fc780e8afeeeaf6e292a66f5207ddb0ab9. 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/TR0330601864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7c83f81df83de2d1489ae7a8812ac6d54e8b745a3cb3d0c74d1bbffa252a4b. 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/TR0330601848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62386719122529bcdfc7c823394d82b473ed7083acf671c61a5c6635cc3fdde. 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/TR0330601878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13fcbb563ff1844f4de00fbb134f2e087adb297a59f433f0e3a8455aca9bdc7. 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/TR0330601877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7d5cd332a3c6c76b460a928a9d3a511c782d8f28d322e6ad76671f4420e0b0. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TR0330601850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc552d92532220f199d02a8af9fac3e51624701aa3012c8545492ab9584c86b7b. 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/TR0330601874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b3b625e303b2d37fbeb36500851c52f725a9d531d2f7b1c440766be768fc91. 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/TR0330601876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506cae28712d14c07a251c0cf74c00bf1625ed3c4f0a6451ac17edb91b915793. 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/TR0330601861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ee082220cd0eb1f3ce6582fd98289c4ee948b428ad839bb74550ef267a6b99. 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/TR0330601867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e5ce458dac0b8177fcbc710fe90fe5a8f17c5b3fa3fcf24b5a46bcd02901db. 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/TR0330601872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf44c6d55f2c6e85182c65750e17fa7191e1b1261aedb9f7072d1db832c74488. 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/TR0330601856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8948df4dbefe21cb0fdaf4d9fc70cded73c69e18da29003dca36b59db96b6e0. 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/TR0330601871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b0b5d8f3393af7d5e50aae423062793ff8d4c681e25b63ffd51c08ada6f0e2. 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/TR0330601860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c048a1cbd55257333be491a216f3cde97130938a23486e21b465e09e1f1da07. 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/TR0330601854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087d22292d70619ef772be7d868a995968608c733af1f526fbf5d06d0d36368a. 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/TRA160000235.