thumb|The S8815 USB dongle was a single board computer manufactured by Calao Systems and sold by ST Microelectronics using the Nomadik STn8815 chipset. Nomadik is a family of microprocessors for multi
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 0xc85c9a87161838e60170675fdc9725b25bbf821ae9fba47f8beb9df64dfd1a45. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/67b8f616-e38f-4965-a3bc-e9e55b8a996f.json and https://artists.proofprofile.net/proofs/artist/67b8f616-e38f-4965-a3bc-e9e55b8a996f.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 0x3d753b3f815e475314949dd84fb1c73f5d0779c19ab4bb96a1095144385fdbc2. 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/US6LQ0900656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9686b5d1e17ecf3988974d7cc2d544716bbd4a6422c398a5416746232df0c653. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USAR18600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a69c3123d7b88f93413404232eb663b60c2178b49ae3dd0d5a87b8804a02e1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBF076520020.
Drop It Like It's Hot (feat. Pharrell Williams)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14169bdfca0ae6d9a14ab1ae3362f5a45139f6964f23968ab2e0415c34806cb3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USMC10400902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48abe675d40844540d67019eb6adbf4ead86d78abcc08b809ec895fbc393a3b3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US6LQ0900658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59032833cd2d51a62b404cc9205ba5c5acb469f72041b9fb20932004175e29d. 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/US6LQ0900659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798b89a60ca7ab176d230031c6d1c2049255639ed28b19e66fc15647367c8ad0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USJAY0900039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd179f6f7e95680909326834289646ab52536b1740ebeabbc399b7f117214db6e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USTB12100088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08827e81ee8cbe9408a48cd35a53a89202334249f2f4da9222a77f27f2c32443. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USMO17000469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03d6ea3d90805d04bdc492dc2daf22b9984f9e17fad37538ede8e9508210aa9. 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/US6LQ0900660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x393dfca04ed13e3c01b53914725e40a4dfad20ce116f2754ed4d95c27a875e5f. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/US6LQ0900661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1aff359cdc822f82580e8f1a69c0c17a757fab06d772c02ca866807d0f229a1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US6LQ0900663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517a7f23fbeff70717d791f836c7487218c5f206c18e1b7d047b31aa262ed320. 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/US6LQ0900664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eefdbc2cc9c6b199e54afb7f682d007730237e3853e49cd84d042073fa415df. 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/US6LQ0900665.
Chipwrecked (Music from the Motion Picture)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde445038f866807855865c927bb8eb7981099b57dc4386f820f88cf71b8bd8d8. 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/USAT21102802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04950e8a839279ccde967d1f5e156fcf6de4b8cb95bb929914e864979b0b2de3. 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/USAT21102803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4033157bd1c53818a33abcefa15698cf04bff4ed790501be34ea21cc01f3d0ff. 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/USAT21102804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c8f9172aebf15fd2bbd0beab838f96f464ce107d4dbd9e4dbe6cb977215246. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USAT21102805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b5864d3b44ce3b6ff9d7965fd010f52d048231b96b3c1b442b1a923d9e83a8. 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/USAT21102806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2caadfac162ea8f03d85292ce6a0407de4a00a151b4f8b218ff77278596990c7. 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/USAT21102808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0009f42d822364b732cfb4c28477583285ccc14693116f7a5f4ad7c4b2e82497. 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/USAT21102809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f836caa468c96de7265f791d0f077a425719925feaa8262742cd0eaf9ffbf50. 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/USAT21102810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12fde7962f85bdba075a683a5c466b9dfcfa63ab95c22ad7f56e8172c48d6a3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USAT21102812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6077d28f00020e8a3d4e0e77cfc2cedd93549ac266c64c8c0fd83f4c8345110a. 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/USAT21103791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7051821d9011412fa842b99bd6070c39efa0ec63f54507a4d4b116bf45c13e07. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:10:15Z), 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/USAT21102807.
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