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 0x5f2ef743b5cb416f7fda81675e999c25d45b9067c3a216600989553131e119f6. 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/73934d3d-63de-47a2-86b5-ed0e7bb7cf97.json and https://artists.proofprofile.net/proofs/artist/73934d3d-63de-47a2-86b5-ed0e7bb7cf97.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 0x5e36f3a7ad50f607ecd4ead0bfd2d28518fa72a590b3d72d6c0ac4594866ada4. 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/GBKQU2045572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fed7c05fec0b2144809de1e3aa734554f5e2090e4257267d3f3d97bd897723. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:31:32Z), 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/GBKQU2045493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9cd3a27e2f1993b8bae1a2ce0b02651bf93b88969b751a2ae184067371612e. 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/GBKQU2045495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cfa18631984899a41e2bc8af81bef0753db3e1aa400f6f2d8674e9d74ee301a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBKQU2045499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7458fab6309f4adadd9c3dc5f3fa6b0135c36d01efd57435705d311afcbfd06d. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:47:43Z), 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/GBKQU2045453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df5a3f2ba2c2ab6cf8039bec4c575dc15123a9cd0b124f257e0769d41c54a3f. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:08:23Z), 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/GBKQU2045454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29d672668871bcd0d59091ae7a022600b7f012fe4cefc4784fbcf5003b5ea98. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JP92E2400219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c5259cfd7e59ca86294fc6863a1b6238f861af6023152f355a757a7388120b. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/JPR502408994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0ad7fd67dd27655810e83d322c3ed37f149632edbeaab86393bc8bb2198999. 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/TCJPC2404060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020f3395dd56078b6174cea8df8bbcf1e5b52001c226803fc99d1682b65968d7. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T07:54:45Z), 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/TCJPI2502087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79490bef3cf8a1296fbbb006caa4859391961add0388f7f545421b704778022e. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/TCJPL2565740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853bd5b53a9659d6b77a759ac574e3c244216bb3ffb58117f532cb03834ee57a. 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/QM42K2476281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bba21cfb72bc42c2b405d0b32311426ec759e8c821e5ce6ca1fbea358f6d7a0. 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/TCJPK2088108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e1129001861c081de009e52dc9ef3e37a6b3396b44d4dd0d1c5268327698b7. 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/GBLV61402163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc379bc03446d2b71b44219061fce6717fa54221b330990cb68a17813046e9c9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPE561200364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd381139fce05de3cbf32e51c615328a0474ad3cdf84624d431d61368739aec06. 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/TCJPK2061134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9ac106f5beab911ac10671f0ebd4fcc07464c5b2e97622d3a9d30c8e6aab07. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCJPN2171036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20fa980729b535065835630094c8eb7059e677cbed8a2568854697e73e5620c5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USHM91434186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd669dde2d2b8f5570ce09b5d75639f35ff7c2e018b6fa87a0a3d9188e890888d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCJPT2288753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c830ff52f8b47c432158080d554399cf5bfd86f648c4b0608d1cf8864c5681. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCJPX2393345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64bdb0eb8e7fc8120fc5540d9ec54d0da0ed2d386925b3046393cd63840ada5e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCJPI1944490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38d2c5aced60facd7b6bbb47b5d3984cde1451efedd3e0486e1c0083d01ff58. 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/TCJPX2393443.
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 0x2f7f38b89b32ba98a1a92f6036e1105fcbbfa128c2bfd0178387099c0030bd22. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/TCJPA2437983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37056a9a463e4d244c4d158ffaf913f80042400bbcd340f65d17975edcc26f4f. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/TCJPN2171024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0681e81bb5ed27f73b85e31cc27d27ce473bd589a79881fda266b5fa3638763. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TCJPX2392835.