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 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 0xf019fbe6ca5922c22edc74a58bdde3bc9c31b99369590fab38fc601624598ad1. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4076b5c-8df9-4f7a-9fc1-ed2e7160abc7.json and https://artists.proofprofile.net/proofs/artist/d4076b5c-8df9-4f7a-9fc1-ed2e7160abc7.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 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 0x1aba3e8e9e3bf5ba4c1fb2505428c88e11ba741b151c3c3040141a563e7286e6. 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/SEWLR1200702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b12051abadb59094b586d0cb046e638b54482caf0a76bbf242552affb0d21bf. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/SEWLR1200703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c50041d737479d54b5b5853435b1625c4117c5b994d32eac5ea55c9c2851a1e. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/SEWLR1200704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e299fa98ad22b7d76605b2947f14eeafae7107931f27c31e2d2c7a35eab852d. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/SEWLR1200708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb41cd4177b6740a4ca42a8000b0016fa38e9eb757183a4a3002e1d0368815b82. 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/SEWLR1200710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98a9af617c8209ec17780de5916cf7781451e8024219243279bf50bb88f5532. 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/SEWLR1500802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9415ab331b518e1d0f3e394264280f4758b172361d801fea66d6abb8ecafa529. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/SEWLR1500805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7b29c0487b2729e9bef037c1082b92fcc785ebaea334943613674cbefc0a85. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/SEWLR1500809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e854b4e7c9549a9f4397d18aa866fd14129c903ef61a464c5cb906ef188b659. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/SEWLR1500810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6500691d8d92ff73482ebdadca1e38725259e4fc251746af04f6447f1a2f884b. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/SEWLR1500811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2265399173841662b4b188f432255035d02cdbb37ceef7992c464a1d50cbf0b7. 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/DEQ121745890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fc9254bf2205c47db3ed9652cae1836039d20219c439aaac1afb0ec8cb4ddb. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DEQ121745891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf552eb1a10a483b6d0411b476f8564814fff0d7c1ce4b756eeed24971266c04f. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/DEQ121745894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310f41dfc032c1e9db445c2a70b9053cd46c905f572c99f50455bc5b1835aeeb. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/DEQ121745897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02286f9cf15799b6cc6485f83597bfaa05cae4286d9c063e5cdc6d013a5ab53c. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DEQ121745892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee0a7452eb1a2bc879c1a69213d297d24dc9a83ba8d3a58ffd65e32909695ea. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/DEQ021804922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3ce1affed768972eaa4b966ecd4bea81e99af9faeaa5c670e314874e016cda. 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/DEQ021804923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d8676d7750d4f4678ffe0cb9a86bfac960c6be5e6ffc5e104a5bbf6ef6e348. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/DEQ021804924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c80d1bdb2a47a43fbe26f96fc87ca533a594225e9329ce4c0e761ad90b7d770. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/DEQ021804925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ef4ff6e5612f26db7c13c6ca34265b42d3a1f8bbc200d1cf3e63f3d72ca25e. 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/DE1KY2405661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47c3d7691fca4d515de22e01277648b105d8b3bad106392303a3559efd7211f. 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/DE1KY2405664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12543b14eac5431112dcc15b74d92818083383480b292634f7410c9d80c07db. 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/DE1KY2405668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5208f8fa4f0d0359f4ad975a4364dd2c0a67a570cdf8e36c272c4dcd0fc791c2. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/DE1KY2405636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00b283f72c3137aa1a4694185a818d4e410e6418a295c55c21b1e5e327a8618. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/DE1KY2405660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47c3d7691fca4d515de22e01277648b105d8b3bad106392303a3559efd7211f. 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/DE1KY2405664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ef4ff6e5612f26db7c13c6ca34265b42d3a1f8bbc200d1cf3e63f3d72ca25e. 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/DE1KY2405661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6184b15e3133ec09855242f136e81222cd29b1ab71ba421a3f9de3081394d2f. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/DE1KY2405666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e9fe85f228aab32cf2ee4ba2eeafbcbc7013bb29c13155d989753ea62fb96f. 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/DE1KY2405663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea865614000c24d98a7686c519c16870f6b6b86fd76338dd2bf707a26f2d49e6. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/SEWLR1200701.