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 0xbf74dc8970a7155a4b2b4017617a635540a8c4508c580d068b958593a4130258. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0d7a3d2-3736-4f7d-9a2a-ffb877e792e6.json and https://artists.proofprofile.net/proofs/artist/f0d7a3d2-3736-4f7d-9a2a-ffb877e792e6.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 0x39a9c9fe160b70d71477d7252dca953b0e9cf57550fa6dfcb2fee1afc006bd09. 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/ESA012246801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9aa6a6da626b83e4f33d5efeecce84577a869c86f70367674525eee11f50e1. Chain 2 (Bitcoin): anchored in block 957752 (2026-07-12T20:53:32Z), 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/ESA012265430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa7327da1d08408ac0183639f46cbffe6a4b601d017e49594b560a55e39af64. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/GB8KE2301240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f4f0a5503fe7158edfc274cd74a5d6957844e3c3c504299b8c29f854ca33f4. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:23:30Z), 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/FRX452371699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f95c018016c6b2458bedc8f916f954b4f3e4412976dba6dd353ed290da7041. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:32:10Z), 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/ESA012246570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237d7d6d85ee0d18197a3b305b8c7ba6dac0e383630e47b94476b6e88f8b6ad6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRX452371705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41242e2894e24b5b186a8a35fdc6501d68a2230673a02da1f57aaa9a774b5141. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/FRX452371706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369bcb8829c91408fa83a3b9439afd43debf68e50f81a27226fc91abc01a9b39. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/FRX452371701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6528d5bc788dc7d73fbdfabb5bb425a2eef88bb10ed5f196b2d848089005b673. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DGA062305528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb4bd536e43e52178bf7b950446ace8479a4c9da061009a2a0881b076f515ee. 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/QZLL92460937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201a4ad37959c2971a24568e564f0c80d38eea615a7c2f1c7ce334492b41c5d0. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/NLZ542300478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba57580a056731eb13577da0e59e1bf47a8526ad7e33d37f7aced2f013703ea. 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/NLZ542300477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48dd0b100ef92a559de226152c8f5cfa1d35bf61dd14176de535e2588782e9fc. 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/QM7282345468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077be7cc9183dce69c61263cde0b71d1405b23d0694026ae2accb98a4fa09aa4. 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/QM6MZ2406410.