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 0x5a7e82cf168ae400700de36a55be653ea20798fcad5ef6792ecd2a121d28bfeb. 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/de9e5b1a-a526-40e2-b57e-83934c02a33d.json and https://artists.proofprofile.net/proofs/artist/de9e5b1a-a526-40e2-b57e-83934c02a33d.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 0x7b60b826f4c583a77154ae28a04d0f217be811c90e2e088d3075bff97a98dd76. 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/QMEZE1882136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2841c0962e265468aba76237cb3ac931429526640a20ed63cb99a5947200d7. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QMEZE1864305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa1d412583a9b03cfd6bb263f2cdc447d892bed22d506fb378c23b3aed80cf0. 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/QZJL41900122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567055d80af8913f0e51d6714a02f95c6a532456c71624a1a705c8ec748db7f6. 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/QZJL41900123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45547b92f933c979d1a9ce4b9bc3268e052f38ae1fd8c76cecc97d82b98a946d. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZJL41900125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b7c41c806e19cd9be510763c6514dbf23e43b32d73656d17d10940b0f0ecc6. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/CA5KR2179297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2489153134c92f64b8effb03032b377b9325f8ef9a9d6c75c0af2e2f5ae8c1b. 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/CA5KR2179298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af2468e075940a02ebc0c586bb860ea15e9973bfa092ef77a376b986ef05893. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/CA5KR2179301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3120eb1f5355be851779dae98d3ca38b7a677b34df595ae6e08c8cb23bf7ca67. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CA5KR2179307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16db3dfbfbd2489f7326eb28adf802db5bfa78a4b289c9166f7fbfbecbe6aee. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/CA5KR2179308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c369713f317c4d6f2004afd2e4a2754dc85d73f3ed415eef3397cc9011d2371. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/CA5KR2179309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841209713378f694ade8611fb058cdd7551d6b42e5a114b55779c685bd919188. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/CA5KR2179318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19b5dfe025c6d9320e5aa569007d9683bf58d929292f6849e5228137c8c8e6d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CA5KR2179325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7fb9887bae56738cccbf3544da9bd1ee3ea5bc9bc9ea1d99486be8f19128fa. 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/CA5KR0006997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6bb8f82e670ae43bd6fa11dc2687cae55309ffb756e6707c5486e94c2cc966. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CA5KR0007002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c08e134f16b0fad4be85a72d4de656f2d9f5016fe7ab80cc18f5b35417e7761. 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/CA5KR0007006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0defdd326913085432f06dd727394370d7f142cf5dd701e98cb675b1e9842f97. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/CA5KR0033529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245eebdb8a3ea33e8fbea168ebe8955c4941dde6a7155b6dfec59112ac32b969. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/CA5KR2237495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c10471eb03efed94781bb2dcbbd119b8e636dd93c34b2aad795dce7cae8c498. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/CA5KR2237497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ef4df75d9fd5bd887aafb6a0f92e93dc9ae70afa6300fe0d497fc311aeda79. 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/CA5KR2237498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a2405b7f2c8ee4de746cb2ed7e00ca5b572a32aeeebc93fd5c6a7a00e670db. 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/CA5KR2237499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24695f7217022790d561e0b8002c0cd7206b14b0f9959460b3b888e083a6af01. 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/CA5KR2237513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc551deee78d274e1f5944164003e900ea4a05b7fa7e85500e594e97fada45cec. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/CA5KR2237514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b06d86f06c3f0bdde634c835b6ca752006c0e960995f77c1084ad7dbf521697. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/CA5KR2270957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c98031a1c0b5c2f10929bbedd3f2f744a26caec1bc8892a5ad0a26d221fae9. 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/CA5KR2270958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b1e0d75345dcba6bdec5f4ab6e9b9afcea98f84e3ce9faefebd20f8039a3ac. 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/CA5KR2270959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6b63d66cdd0b12fc744e87efd1633a9ef32c74e0434d986ecea41ec8fc648f. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/CA5KR2270960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2971900af978f29f64903bbf41c7c73fb34df0d4da0cccf08703409f1673ccd. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/CA5KR2270962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefbd30c7cdc56a2920134c35f38c44fb5f67690f1f335c1f7e1ee1a63eeccd0a. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZWFH2416371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8887a309c86a200b23f36fd9c12f6f2cbee5068f8f3af065fc0e2e473797ff. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/GX53U2661020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7174519aeed99f9dd4700aa108b64b0e6f21c33b0452831f9af913424e1e9455. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/GX53U2661012.