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 0x9ba6e074b1b21a3572c21a8fd7aaae151c45d2cedc22e8da73958ce851b03f3b. 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/a9b5e9ed-1a4a-4537-b292-1f504872900a.json and https://artists.proofprofile.net/proofs/artist/a9b5e9ed-1a4a-4537-b292-1f504872900a.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 0x98f3e60374cd48cabac3ca9ba6b0dbda98009e6ed3e11b292970582d5d6fc4e8. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QMRTJ1250001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7374b256c7542ef55b7bdf3703872f7f9e1dd73c60df4864805610653a8045a1. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/USHM80795857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc860e89b428d8a61d324939da9001de8dbf1f02303e8524bf1cfaaa86b369a56. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:03:45Z), 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/QMRTJ1250006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bbb3f1d33bed4789e2f3da900d3e7c29ff0294df6689174f7f74543cce7fa0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QMRTJ1400800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b77a5ef514e0b14e44edb531e961196e54937ce32220a8d67315f878301f5c. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T22:59:49Z), 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/QMRTJ1500702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6395899d6a38f27587ca198fcb37ef5f1a82ffb15bcb27422c3cee08cab3ac7e. 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/QMRTJ1500954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64cf9aa55b996759325debb05c12b67ec25691f69ea4212d1c0fc28ff48edf59. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QMRTJ1800547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70d76662aa2063fa3b9b3d047a638ea94a21403f03ce81f98a8dbc0603c68f6. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:18:07Z), 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/QMRTJ1600873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042ef91987aca4228aa640f7e47208abc6a070514f0d31472b07e4c68f50417b. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T19:02:06Z), 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/QMRTJ1601108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c25e3c2db6cec1f5827c4ee32e20d16c56c2e06f5a1e7839b2d0d7da051fb16. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QMRTJ1700608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6944caaaac015474059c29c394863739cfd6a8a6dbc3119f6bd6ff20b9336023. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QMRTJ1900243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef6a0fb1c94f69db8cc725eb22cc5ce02b4c826f7ad477d68a3b1947e6a9d2c. 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/QMRTJ2101304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0d5a5716c647fd9205a4af49fc8af1df9550a358f8de601b1eafd77a473294. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QMRTJ2201068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49d32f01f525cdfee1979b2304207af331ac864b61b04c9857a86cdd550673d. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QMRTJ2300937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903ac375cd9b8cedfe852767a98fab19b4bbd445a9e197c02d92cc122493dcd8. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QMRTJ2500747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3adff7f4d671bfca558a7dbabc6740081f7c0098c9ae20e7b64fbe17e8393f4f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USVPR2300073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ecd551cf1b22e1f9ce41fe305b064b64d4287deb983bd8dd7fb1cb04cc0a1e. 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/USVPR1200114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67bc27cd75830f18fe660e38e5cee23eef7944670415d33816179f9c3ca9bcc8. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/TCAAY1158008.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe29f3f7361297d9a71a1e59ee033626cbeb2557b95fb4067a58e33f22a4986. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USVPR0814106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10bbe8f6a77cd8706f1a1104671febb9b76bf01ab0de4ff7fc8f6790ebca02a3. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QMRTJ2100075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8abfd1c551981499167be7bb2ffd8892a21fa0ea71cf59a8a7b3903194672aa2. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QMRTJ1400786.