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 0x57d11662ec86606fb0320dec2e745b572e6b3e890443600c0d32057e26e33eb3. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8bcf4a0-a633-4a7a-83f4-19fe8d05008d.json and https://artists.proofprofile.net/proofs/artist/a8bcf4a0-a633-4a7a-83f4-19fe8d05008d.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 0xd13fd7c0e410ff5a9b98affb8a3bd8c2b608bfe226c0595344d05c2e4476e22c. 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/GX3Q92391149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be1d1a163f578c8967fff4d651a280ed50806ebc9212fe14d676fdcffb2ce58. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/GX3Q92391150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5166874964cc6613ce8f4e82dea7e2519fee03b0e85e473402f76ea4c3710736. 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/GX3Q92391151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb681be4c29322da4e0840f6cfa1319b040e082f4c41c0156fd25a6696b0be953. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/GX3Q92391152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf9cba1528c18f428eaa06cb4169876feb94b0a660002d02bb3166226cd4702. 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/GX3Q92391153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35101d833319e98bdeae8f563b88274336e70e049e8e103366dad80cb044746c. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/GX3Q92391154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0787c4c477bb88f20a05c81aaceea46831e4ca1c231e4004040dd26a60a3d42b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GX3Q92391155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c4d5a8554cf63b8df1fc85622cd41ed7ccd00264cac9799c8c76dbb4bffe6d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GXF9Q2598189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec35f6f09960812492a6a0f75dc6c2db7449aef8e464e16b1c59bc20a069fa9e. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/GXF9Q2598190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261d55555783d5c06bced6315cc201c4da586bb20faf6c2f9edd739ea696c585. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GXF9Q2598191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee787d3fd61d320709a3ccb18978c429908202c501c6b5af689e768ad56b3a6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GXF9Q2598192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa82735da08bf0969d09a48e8a059dfc55cfa555f75363b4e03796b33ad8655. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:00:38Z), 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/GXF9Q2598193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd095554bda88f0181457edf820d9aeb57e500871385c17a8cbcd469480869a5f. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GXF9Q2598194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c68d4aa00ee1dd083db59890cf1e7ec34908a0c71db0dc41e4164a2fe5c4693. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/GXF9Q2598195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71efd79e16734b3c7ae5518abd78305c50f21085e6dcaa7e6315b7f8b5dbb58b. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/GXF9Q2598196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1175add10d101baebf80f2a239a6acf13e94f6220905855582887066821af87e. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:56:35Z), 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/GXF9Q2598197.