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 0x409cb8babb924ddfd7526be1072979c0203938e76e1424b4055456c12240490e. 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/ede3d18c-dac7-4e40-8885-a098bfaac762.json and https://artists.proofprofile.net/proofs/artist/ede3d18c-dac7-4e40-8885-a098bfaac762.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 0x0147d872f38d4b160c45bbe0be96195b85720c7b703719b5f411e82d24e82edf. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/GBSMU9285382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1919261eae630c334313a57321b18b727ffaaf1ed4ff6601fc84ec2c3765ff. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:21:01Z), 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/FR59R2121017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84e3fa95e144041c54500b67bbcbc796dfd6951ad55f73ebea5005508d34475. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/FRX202206523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274b794d0499d04b51cf05463400d009cd26ad96542d6f164181b0a0ef01773b. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T08:26:21Z), 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/FRX202206521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2571bb1c92e2349ca12fe0bd89803c43a4cdd8b22659420898596e7cd50c3e35. 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/FRX282239360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f0fb5f58a0e20619b840d69b54bb89ae818608899dd999cb0816dee62ff058. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/FRX282150260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323eb2d674aa99f3e958d86507ff3d9d1c7a93c57522948d46edaa81656929e1. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/FRX762198563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab37795f55ec8056a7d05cb3d09d1ed24b7f4cb7c0c4d4df327e020ddcfcabe. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/FRX202206477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2edc11bac3b67039e3968f762d6b2672b24e81fd6e16f85a23e4649bf7fac41. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FR59R2244480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58c46af0eda96b3260538e31ac8182f56f88397429d93b1a903262f4176e6c5. 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/FR59R2244481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787fbabc4cacc6f96b1c71915db7928b4d6ac97fd71ece70bdbab366bf0583ce. 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/FR59R2244482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1402802635a11ca52df8a420a4810e3d20541b6071c2c5cca195c0eeff2eea3d. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:39:23Z), 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/FR59R2244479.
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 0x88365773b10f71059d6741722f5ece8cd048ef61b4c76c5f8431ee75d435d922. 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/FR2X42384722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d8e7703701ce4710fbb680e346ec464af1b2ff153fb4aeb49a9816e269f9dc. 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/FR2X42384727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972708bb8ef27e9e362bae4afbde8f9872a3eeb0f8352733780722e65c12a685. 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/DGA052380536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8bfcd29b96b06401e7bedc6e84d7fcd51b5f8e106b7b8113a5cbe722868add. 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/DGA092396704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b13f5c5719f77cb3ba89f18f4e4b574495134696c0b8d74431cf416983d0190. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DGA0Q2368755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb337d86923aefe0c5b98eb8afe40455f20da2eb5d799e873d993cefc6e7f7e3. 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/FRX452462940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8888e1610298a33e2658cce3714f3aedb384f990e5460e5dcd4bb4bb4875fceb. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DGA072492116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b21170d746bd3dba00351711e57f8f094ada2f5ee55263176f8573da0778aae. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:05:00Z), 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/DGA072492119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb334ba812e905b8239ec46b28a35797cfd57da4400eee1dc33b630a9bf0a9904. 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/FR96X2598005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e515b74a5670f254ff8370964d84b30bd609ce5f3dbb1236dbd95dbd0db69aa. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/FRX762529472.