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 0x19ac604ec2206c1230ab81a4756c6f179c67232a34099b0f55d58effd546e7ad. 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/0f8b2b81-89cc-43b0-ac9f-e6040ab80aed.json and https://artists.proofprofile.net/proofs/artist/0f8b2b81-89cc-43b0-ac9f-e6040ab80aed.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 0xd7b9cd40da5897e59e65eee068640c4a28a2e84e626400b796107f81fbb1f0b2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRX762079603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95cf86c8020fcd9e47ed5f510f1e73d2b940d7a6f04d828e432faebc739d653e. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/FR2X42226812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62664cc5072b7d6ea6851b13448c8c884997b1950a280b0f31cfd6004843975d. 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/FRX762261640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bad6a8e8fc552a05f5fe6a36f110c2ba8af929fd2192c402394e3f688784694. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRX872234826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf024a1ee7041fb1f289f195844e812ccc21b4a2e629c6eaf1831e4c838bf5e3e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DGA062377966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a291a6417ab3b3354719678be8b4d671de48e84aeca966327c3c6772805108. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DGA092353181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7e532134c37403eb223711948ab97f71387a803a8605761a383c2e6b8fa4eb. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:38:02Z), 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/DGA0H2302647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e1745e88bcddaca6c68b5f1ed9a9910589caad5a382ba2ab4ad9a4ae4f2bab. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:06:45Z), 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/DGA0H2302649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225e8bdfd0aa3dc3da7613b0693a620dbd656480031960a9dbe57a743098d298. 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/DGA0H2302653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad6736fc7efb93446fe861eda0d8a2b1b340e49760b2a96807488259c906c32. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:07:02Z), 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/DGA0H2302654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee979a2507f5a9c87957accb1e58cd1535a248f797e412f44263208ccad4eca2. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DGA0H2302656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12706b71777e2b3ec7bb996d51430f1a211a92eafc2a2e7bd01881be397f500b. 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/DGA0H2302657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e7599881480a3023a25d4b0a1f7218d61928204db4e5495614eafaa0372c80. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DGA0H2302658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081b8831a70aaae4daaebd854eb50847ed7e86389a7e01dd4ab5b44268b14365. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:29:04Z), 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/FRX452493504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1803d53e78c9c77627d49403f4dd2cce0784eb3431066559098eecb4edc42084. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/FR8FB2413500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f8d547311a38353cfc0d4f9de729028c94d2c16769be5282f49da949694510. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/FR8FB2511100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc753c0d9fff502724ac3c46533faf12366859f251fecfd075229b80a89fe4905. 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/DGA072426949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d209f9bbc1559293521f9d6e9f8ea202f62174e230256507b48e591de4e0cdd. 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/FR9W12338505.