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 0x5221960a35fe6a1cf040ed918af8ee5ecb2351ad84a9867d415e70466f63513c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2363a203-7bbc-4d76-8fd3-d96e5f58a5af.json and https://artists.proofprofile.net/proofs/artist/2363a203-7bbc-4d76-8fd3-d96e5f58a5af.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 0xfc0a2d36b3df5c408e3db1d608f27ff84e3fd41bfc4c332239d56454960e3fcb. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:04:14Z), 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/QZHZ42242124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8faba5efc3419d9b760b631a484d01155d609a7b999cf8a5ad9b433136634bc9. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:50:08Z), 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/ITF252200069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae10bc69658311a487b34ae3f67fba979d2c8cff01e594db1578779209c25b89. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/ITF252200121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4897af8dcbf6a6adab9592c968de8f7ff8f5b85e2f2471a6b15bb983ba35616e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ITF252200149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13618421a6f23fc4549904b9e40ffa205e2be4a14ba8e398ca192ccccadb2dc1. 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/ITF252200205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05684e270b31d036eefc44332d59e6ec507ec71ebdd4e832f9765e876091b6bc. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/ITF252200207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60f114cacbc0ab6255275585ad08f306cfa09c512155756a85c5bdfdd7af8e1. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/ITF252300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40935b631f0249f4f88b0a3f3066acb5d85014af85d98c749765eaf75eae66f. 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/ITF252300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0721fcbfd2e1390915287686713563d214cfa35ebc3e09a4c1c59fd5b96e049. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:15:17Z), 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/ITF252300056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f9cebc0f4aeaacdf94a831f76e3f6d5c41b5aa1faa006c39526733ecdbf718. 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/QZZ662340679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c208b36117522b18e098cb17354883b30d7a4def05175be4c8b36e40718386. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ662340687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916691291dfd0bc5cc485f9593565e0c4567040d0413b9f303dc57146b4559fd. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZZ662340688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88fc251eae8df12a793b76fc3db59cc2acc75f8fc1cf341f9ff7661c9b98e3a. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:21:26Z), 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/QZZ662340684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492fd6650c2ac08e808e65e61332358d63c6c600828dd01caf489a0d8730eeff. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/QT2JQ2500075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef3dbf4f13eb783ea5c00855dbeba39d1d8449a420fc81d673a73b0176a694e. 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/QT2JQ2500204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79888a3d160b8289d3213414f374e7e44f0c6d70c76c02572a165453dd8701a4. 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/QT2JQ2500255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e60570359c91fa1dbdb762875dd843cf88586b4e6c0e311df47c15dc383e18c. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT2JQ2500470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e47d7532ef8553e4688037303644dbdf09f136aa4daefca7bc85da9081853ba. 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/QT2JQ2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3040e740b1e9988c010b1003ec718a6ab16441c849c86364604e3ef0f03c99f2. 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/ITF252300082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975df9bc5c67225c7c63cc5a29bb6403ecd886c74de4ffdecdb95f72fffc5aaf. 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/ITF252200150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820c5e4ee9d471452c5e8fbd2670c683a216c5e8df2eb499082a557d892d1bd6. 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/QZNJX2424132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975df9bc5c67225c7c63cc5a29bb6403ecd886c74de4ffdecdb95f72fffc5aaf. 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/ITF252200150.