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 0xaadd54c9b52ce93f9cdc462269ec44ad751b46ad4c1871e8983b33f22f386862. Chain 2 (Bitcoin): anchored in block 954618 (2026-06-20T23:05:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c834765e-919c-4122-a908-4eab075d1bb6.json and https://artists.proofprofile.net/proofs/artist/c834765e-919c-4122-a908-4eab075d1bb6.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 0xbc64268621862a36e51b247e90a5addbd4f200d65433fdd3edba887a68482c8c. 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/QMBZ92188464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26650f5547e4fdd6ecf45c3c250dcff3de530358f4de8215d3af06d24ca40872. 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/QZDA62256431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d11339499ccd1ece56b18fe3a5fb749bca0f32e2f311452b2cf598675b27b2. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM4TW2191008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637651fe18315b8cd4dc95aac92699ed1b175d2133dc1d0eb530f59af600f856. 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/QM4TW2191009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64153418efb92837a2268068e55adeee2e26e623f4f61c069741b677a8540477. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM4TW2191010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56188fe0581f3d7b5c13dc144d9ceee2f687720502f6783fffd6e9569b6e7cb5. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/QM4TW2191012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6d1b77b9e6855c061132e197f669d30149c6db77967aefc682bc7d427a7eba. 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/QM4TW2191013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cbf8d6aaea6495677de1cabb86156b1883e603d512cbc6ef639391c983f834f. 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/QM4TW2191015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520f8ffc2784aa7d5670e817544c9b5340227853a5a741ea4d58bd728bedb125. 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/QM4TW2191016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78fe22b080145880e3a7622c8613d8664591c54d389eb4ed81747e81c08fe0c. 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/QM4TW2191017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5b7c9daa02f67ba04cfaaac74026f8ca4535dee6f9069ade54cba4d7c7ad51. 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/QM4TW2191018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e6942d8cd76c08419bad05b10b45af9b956c3dc173ad477bf0418726089cd3. 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/QM4TW2191019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e181482174c8a1be7a0a9617ea25397011cde1973450a6c79e7e627fee493c7. 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/QM4TW2191020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836ac7232d68e40dedc2df5ab60db38af3caa1975b2f9ea4e5b13e946b302375. 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/QM4TW2191021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec43ca53e5d70f788b0d1477c0b5a946c4284a3b6dfb599861da72d0e65efab. 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/QM4TW2191022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224a25b6d487c195b3f7c382d3d3f8f543422ad98e190f961e7f3aa875c6981f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM4TW2191023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9f7faed990076a379366ee84fc14d6cd57f8c0853bec98abe02d87d9848fc4. 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/TCAFW2196352.