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 0x4cfed9c1644bf48245a1e4b7b03d0f4944436e8da9316cd3976cb01210f3c9ee. 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/1d5cd178-114f-44da-8c25-26808a59d148.json and https://artists.proofprofile.net/proofs/artist/1d5cd178-114f-44da-8c25-26808a59d148.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 0xbc8f2b93c470a1e60298f7a949feb0da9466e716a625b96229f3e081d73297f8. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USCGH2254435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb352a875f725fc7e66cb6584a34c7d885f492ebcffe26c9de6020ea2bfff0d7c. 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/USCGH2254436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b84f060ce46ff9b676e2bf6df04a27ec4b944b1cbc44317662b12911cc5a364. 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/USCGH2254437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31558234dd5ff9d0ba27e75cd7043ddcfad3645cff970e382abfcb3c0707165. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USCGH2254438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8ac33e1a96a3133eeceaf3948e9e018b866d38e8088c484dad0a64b9b18bf0. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USCGH2254439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf609963fc6985bdbde66841551eadb0ed66d6a24dfd42e520c384e94f732b0b6. 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/USCGH2254440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb675fd064af412a3329a0821dade999b78ac7d6bab1de3d8fa308f9f19e29327. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/USCGH2254441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c06a0d05471bed22b246e8c1d8201b67763bedea0b68f2c64028f09e15cde0. 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/USCGH2241865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50cc4b504f647ab8da022697164bc838a73f7c767fe2744653a4814a8a6cbb1. 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/USCGH2254427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17500d61a51031c462436573fa3b57c83cfcfbb5c0e8e3094815a6037336d8d1. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USCGH2254428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2491615e6ca787cadf62cbcd04e4bc7999bd44f34c79b5bb399bbd9b80a3c5b5. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/USCGH2254429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96a53ca0410cf641e5d15caedb182292c11265379d7b4fe6a387485a020c8d9. 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/USCGH2254430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698ee723663bc6058c32f90db9ce3a4b62c808c5726826a95eeaa0730d4abdb1. 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/USCGH2254431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9524e1c40ddda17b9308f76a414c412796730257cafc39b3e944d63089d9fde. 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/USCGH2241814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa797f65a12d638a3837d21f2eaf603546e54e8a05b039f001a18348644f197a2. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USCGH2254432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bbca69f377374a83c867aecf64b150a2fb398128dc5e925219dacc2cc609528. 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/USCGH2254433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf270e0a14a31d4be5949ff3f89d83929731d6b59c073b437b238482fb69d531. 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/USCGH2254434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d69c42d28b012121c77671fc5337336da98757b1137fe349a1b35fb20196302. 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/QMKZ81300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa144e4a498c26be1e654a295f786df73f6cb09152a15de0d707f9367a9a65db1. 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/QMKZ81300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f54a0966a4a10cdc04e9eed7668d135ab10fc842886931aa1213f97b01c1e5. 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/QMKZ81300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a30a9fbb4ec33c323f9060a395b64411fb40d101dcd44e512454e5e4196fd91. 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/QMKZ81300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6989d7cc809ff82f0c60af71dbbdb24340bb8291b398831af7bd785f143f105. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMKZ81300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c45d560ad842b3b63467b177298119aaf8e419c6b5dec4711c8c32a4c58531. 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/QMKZ81300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22cd0296b72f6ea87a91ddb94d2f75f1cb8f90fbb2fee05f2982a38d310f1514. 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/QMKZ81300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eeb4912940a4dd73014a3ccf31cb6830273a7a2d691ef1aa402ed474641d875. 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/QMKZ81300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8f2b93c470a1e60298f7a949feb0da9466e716a625b96229f3e081d73297f8. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/USCGH2254435.
Jam in the Van - Mike Clark & the Sugar Sounds (Live Session, Los Angles, CA 2022)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42502b9271e8e666bdd378c5f23ac4a3cd4bbc06f0522397d3381130d10a9c44. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/CA5KR2294546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe6c747d13c4bcd4b397b6971c0038e560f0b16993171f9c939657f76192885. 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/CA5KR2294548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9524e1c40ddda17b9308f76a414c412796730257cafc39b3e944d63089d9fde. 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/USCGH2241814.