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 0x6415467049966e88a14d43a2cf55bf39378e3249bc86f1aa6d882e89f209139f. 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/ebd1d6b1-c1a2-4905-9470-4732d2daa4c6.json and https://artists.proofprofile.net/proofs/artist/ebd1d6b1-c1a2-4905-9470-4732d2daa4c6.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 0x7cdda6bf20e5dc9219abe293a4671a46064410a8cdd73f83b282c0bac462630a. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/TCADO1880766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089b1a68f98a7e6a61a1432961494f7cedcf26ebe2386c88b44cd5910d44559f. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/TCADO1880832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0380ed0cd6868773c0eeacbce22f5ed06c25df261cca7e6ed78e7c9220f36c0. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/UKSP41900018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4e22b64a2ba03bb05eb97f8077f19f6728231971bbd2d8cda370042a24dcbf. 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/UKSP41900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadfe3edaaa40a324f7ad6224b90c214272b39cfbe3a8dfff3a2f547af81a9de1. 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/UKSP41900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d627cadb22e627beb96c6579f7ecab34cf60e8b372d184860fe7320fdfd253. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/UKSP41900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566f88db44b77b9b6d768fa51289783b8b7b3dbc0163a018dad693839de6590d. 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/UKSP42100064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb412825d8b087424d0213f79d1c2a36557d38868e7daa7c8c55d937702dfd79. 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/UKSP42100066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6222d6ea28b542b8c8ce9e5dabc9c463910eb2a3e37b7384c3fd64a621526b8d. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/GBJX32264701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0e39716ccf39c847cea8167f3e9b33dae052e99b35b5a6d451e2170982d209. 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/GBJX32264702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b371f4b9f1f9d80e26fb9be7de92b7d5ac1f3751fc21309e121d945bd463bfd. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/GBJX32264703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfd554e422f7e67dcfda32a96d5787c314c235396d8ab407afba8c267ffc8c5. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/GBKQU2218257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd239a619055e91f5e9a34f5743ffa752cc88be08dfc022850e9dda16bce36d7d. 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/GBKQU2221603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903c97fc631978643069e6497a8b03ec8972b7d1cd5cf494fa92db613c17fc27. 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/GBJX32261302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916576fff3521ea149786d374fc3052d8207bb74a278aa5aded14199a3d4f7d2. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/GBKQU2331946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf4d0b8264db34ba167459db52c54f2cfacc694077c51cafd1eff219499b404. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/GBKQU2334430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd702506c8c965a6d825664997123724cc24468bd889e37ef6c843ef4100f7c1f. 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/QMBZ92356931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c5784ff8151c8885e748682f39c39e6eb4599698bdf536ab2df7ebda460394. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QMDA62334167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4b1adf286fe35d80120fb547ad5c44f2eb3c2760810847ea61ae756e387467. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QMFMF2300907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda3d0af2e167696b165d96c2f8358a248dea21a46639b1fed73c4342baca1ed. 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/QM4TX2459969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c2f26d0ea7e01803e0828d54fdca7a53c6063d30e2670e308682626dd67afc. 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/QM4TX2459970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4abc731a64ca6161085ce894f5dadcd645672d36f0da976d600003a6d2cc8a. 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/GBKQU2454650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa922069f938cf855f1be8c42e8b41a65b2a592bbd74a8577d7398e58d651e6a2. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/US83Z2423547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d67abc8f039cd44c2dfcc0f949fdfe41d5b7ab0d06d7f83d1b2dc14f845f93. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/US83Z2423549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567561e36392b170c6af7a19c2e24083fb3b384a2919a401790ac330bc843160. 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/GBKQU2588393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a86adeface327e99747d77b8fc6f1532f93e187212c4b97c5527c126d618e27. 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/GBEWA2201483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b0f0c4aa2dc9e03ae1ac33fb013cdabc10d93b1886af7ecca5001033c3a009. 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/GBEWA2100171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc8c403a4538079daaa832ffc4ba0b601b68e2256b71c0deaddda60e7cae8a4. 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/GBEWA2100174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee8e4185645334e044523bfab3fc163f87c38652103b9c47b05d1d454fc9eac. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/GBEWA2102362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b0f0c4aa2dc9e03ae1ac33fb013cdabc10d93b1886af7ecca5001033c3a009. 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/GBEWA2100171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ff46aae1910faf35d31d14b394514fc906eb05fb9988e715464c5e73936306. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEBE72200311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1207dc989d99429b18461297736bf0a77ed7784c7f67f16e389b6ea3e38373df. 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/QMFMF2113351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d9ca5627613146c793a8cd8e856dadbfe397470c61a0051a12fb13c168c36c. 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/GBJX36116123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54a176256f52f9063980d41a1c79920bbe9c97c39b5c107ee7ca9160b5c4343. 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/UKSP41900172.