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 0x44cb34cc2c5d6c082cc1ecbb2cc909f6bc40fe7e68c201e3a5650538449854cf. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/18170636-81bb-4a9f-9787-b0cab6340b79.json and https://artists.proofprofile.net/proofs/artist/18170636-81bb-4a9f-9787-b0cab6340b79.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 0x7cffffe78b205e24302a03c5b795fe8f060e722f0faeeae14a3dacb4957063bf. 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/CH6541751717.
Oi! Ain't Dead, Vol. 8: Chaos in Nederland
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688e177df1de9457ff4ca124ac838d6e3f37c197c8d84d6f43884971247272b6. 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/CH6542371234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1858662beb2686159c982182d6d1bd1f17c1058f1e28b978d22583031e9b69. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/CH6542371235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0572094b77f76f2e5584cc873c92777a91514e7c646336686845db8d00adb12c. 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/CH6542371239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10d257b389800b4f36f57ce8ba4692766aac319da6ef66f89a943e1468c2603. Chain 2 (Bitcoin): anchored in block 957253 (2026-07-09T03:08:40Z), 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/CH6542298773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d60545c42779d300093dab067bf97b934ace2ec15aa791b830ce04328e97da9. 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/CH6542298774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e18d9b5553d69628d00c849a58ff00e6df58d0e8a6e0860236c14cc4b3d088. 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/CH6542298771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6737c3ea94e74992b940fbb831bd33b97c9c12270af9d9e7c91d26a24a4d4793. 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/CH6542298775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2fac3ef257f3d0948db81557e62d890a5d5a1bee57a8b6c4a75bcae9c57584. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CH6542298770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaebb8224e8733505d021a649a68e825492a78ccf3f54954b35136bd4886c862. 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/CH6542298772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bce6d7928ebb8fcf52b8c29b57988a24fea8dbfa0128755bc24457a98e01f5a. 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/CH6542300321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c15ed6aef831048d82a964f2456ff6ffe0a2f881f97308a914d8f8d5c7e00ee. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CH6542298777.
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 0x767457d8a96d65e1af151138cbbe2048294815629e43cb4c96b7511d3e56801a. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/CH6542279188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe158727c5f50c1415bdfaa1d173f6f74d3ebf027db5a261d5a1a18a67aa519d1. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/CH6542298776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2db7deb95c9a5fec679d0f26294312f268d30fd8ceb170375f9597bb44418f1. 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/CH6541653784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b0d557557c32dc71782a77b2b9636d85d79d235546f4f4f129a554584344c3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CH6542104159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3733a0a42183096495ed5ed54a1db2a5f7c4fac89322fd34134ce0ccea16e9. 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/CH6542104156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5691acdf098372ca9ba4e53c2c2c2a51fd6c96c444b2b3484fa049b048a11600. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/CH6542104158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913d273c710569cdd07dfcb19c1b7a1fc9c28a4282a0e6f051d06977c5fd0e43. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/CH6542104361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe421ae730b2375a37576ede9067292f9c6e5e321abf3861646e77a6a1f7250dd. 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/CH6542018117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29417dd77c54bf0dfd87cc23dd19d95798b157bd50f0275b092eacd416193583. 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/CH6542018115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0347a87188e71a9fed821f6c1a93bff27aa1c3a71ce333288b3a9be925afec97. 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/CH6542018105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0acfe5f0aae624818db9a9dbf17bb02d74553c0f725e24ad71d6ffc4baa17fdf. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/CH6542018116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0023a95c64ee64c83540ffa53dc928860a542906fb1472407c56e3918abae0b. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/CH6542018114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f61abdba041e7524873c58b523f73bb9dc499adbd80ec8b062ce83e7b27b8e. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CH6542018113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc578b0e501c1073c3faffe129d4de6ce3d328beff3f1d4fb0e6889d82cf9464e. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/CH6542018112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5beb45c97e922b9523c1a832fa3c5170bfa1a7d2f86b03f8903d5a193bf45dd. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/CH6542018111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac1628509ad01912c038d0d3341ba26dde53e16adcee092d53a0ee233bbdb05. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/CH6542018109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08c0680be91c23959f830af5e79a2ff5ebf0e933e355de897a55ed570d10c56. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/CH6542018106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36293edef09fe0a4eb5116681b8265e1d0ee4f0252719c08a595bdb10551564. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CH6541919610.