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 0xd8f03d56f27ae9921374a491f86f3a1f81b91154676adcbc96b5e844791d6991. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c89aa771-c05a-4087-a9ac-7a0f6156371d.json and https://artists.proofprofile.net/proofs/artist/c89aa771-c05a-4087-a9ac-7a0f6156371d.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 0x00353fce9c56eb82f10576fa99bc4059abed1cdbd75c92fdbe2d63fdb6891ad6. 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/QZMER2494706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfebc17a99f47c2993526071d38fc3c907b735b75fcc0de32408aba9a5d79858. 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/QZTBA2405055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c76f3d681bc4e7d5b1d694b2d9a73e1b08d2b18ae267e1acaad29126c189a6. 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/QZZ7W2445420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f8aa85be2bd942cc50f974c11181133cc79b2029b6dd6779498122b79cd03a. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:11:14Z), 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/QZFZ72500209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f50700f2d6ad8ccb7b0a74f2dad91097b2fa28fa4ac70647d6291185e2c68d4. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:59:55Z), 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/QZHNA2590542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a7160b0745f398bacf929d726e1c9b0c326190eb798719782bced28fd1f2e8. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T16:02:01Z), 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/QZK6J2588131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab99c909c1768bd9f2d8744d8eb79fbf3bf2688b6ddceccba02108f629223bd3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZK6J2588132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613bb88950a8a760fc7c25116c923a2a619c087a4514ff555254b870f857b9ee. 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/QZK6J2588133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d96861e7ca159daea1ede9926e2da7328ebf6b39b35ddc5cd6e339d3b1c05c. 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/QZK6J2588134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f69596adb2a042ff3f0517a4c315f626e20ffaafa181f4c7afb9431b75ef942. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZK6J2588135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72760f62388c9b749177af13874585ff692a264c2e49a42b86c71a8a4526f69e. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZK6J2588136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50008e366ae582284d1e8322bf97dfc490855bc4c5fa62808e70b6298abf73fa. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:23:35Z), 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/QZK6J2588137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a5f0ffbf9ff725d5e63517703551761ecd339ec2ac97a88790da025e8ce7d1. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZTAU2558085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e0d83297e8509f98821a23b1673c485db85ff04c580ea7f2b604cde395686b. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:26:06Z), 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/QZTAU2558086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab5591a958b305e3d693ae279499e20335b1cfb5cb8eab1a76f144710d7f87d. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:25:55Z), 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/QZTAU2558087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eddfbd748e93f79abbbcf8280455be90817b2277488a588f3d9e3d1cbb69edf. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTAU2558088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c09e8ae8e40f6bab658cb76db8749aeb6d2258ed848e30f491e77c0666984d. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZTAU2558089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5f8e29b46f83682c4812b2553f4826a72e551f57479e64094d916c9116f20d. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:15:37Z), 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/QZTAU2558090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9342aa860481b0e6fcc7de861819e43707e1dc60ff3c276ecafb29325b16ed. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-20T00:29:22Z), 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/QZTAU2558091.