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 0x5c26474525ecb78e831db84ec8d3be2aea0b40dc9d9a9e7d0007d970feb1228d. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d256c585-6558-4e94-9a26-1320f7606aa5.json and https://artists.proofprofile.net/proofs/artist/d256c585-6558-4e94-9a26-1320f7606aa5.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 0x29a13948acae2a51ab9378884e2939e1f66afc1d8f45ba5d3274f038caa518fb. 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/QM6N22136258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b15d5c0b1708b5e87b8be87d45df4f8b5d25db15391b79bcc8aebaec81f008. 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/CA5KR1805171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff30df8b86f4c835066a3b50e280f6a073a7e869461b156c737399d95a630cd7. 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/CA5KR1805172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7c8fe17e771157e8c54d98a062d2167b5eaa2ad38d71cf5789d42c698ef292. 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/CA5KR1805173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a84bd656e1543091c53b1f7a157616e1936e916b5db1ee654cabd6acdea241f. 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/CA5KR1805174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035d31ae3a00ab398bddb311fe0de66976fcb794a4ddade34d882efa9b024513. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CA5KR1805175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8548e95323a80e23829c38aa5fcd232be3b182bc32d69e9c1b090b9303f00c23. 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/CA5KR1805176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc562a0bbf72e5cca3c56f0e392262b70ca2b79b3ae4d24bf70f822ec0c9ec3. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CA5KR1805177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd90740ed19c647c732601a61baca66f42039000d37b0a83aa3b3cb4c15fcc3. 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/CA5KR1805192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc99db7bc455c03d0a7a6cbb0f11e3d3409ea5bf5593a6fca1b4b3bef129de3. 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/CA5KR1805179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba707670028e847d8c2f8555a167231bbb0f41a04d2811b22f62cfc96d99f36. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CA5KR1805181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9e2d01cd80b998b28e5ef67c53f22e3cb3155aed422421ca7cd26ee65a3445. 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/CA5KR1805182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf4f0d87b854cf780b9074e0ff2748eeed7a62727bdaec8c8334dd2aa6be42c. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/CA5KR1805183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe25bd8c91cda83af54dfe2d8a3a944fe610f6751afd5ba612fd5f36b1443af7. 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/CA5KR1805184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be2c5854ae5ca9e802b687f218a5c1f2073a439903730b3a2c907eada8b36c3. 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/CA5KR1805185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7a90a37d0d78b199f75d7f2885ba7a3bc7b65318f8812c0be6b44b3257de54. 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/CA5KR1805193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc888087a9e4dcdcdcdd30a45405130a320733cb7d4d7a081a3391f2769467db3. 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/CA5KR1805187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfff9e3fbc1f66a8c61b493bbc181d55abff64102ced4a5ea4bbde247156e29e. 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/CA5KR1805188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90359f4d3fba541d60a5aefb0eb4b69b39ca6f4c918b3303adf8d82791572a0d. 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/CA5KR1805189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d62cd2a40b0fd583435213f2ca5bb155ec5643cdc4d7d1074a7cf9ec6a3e17f. 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/CA5KR1805190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c2c343a21c21dd3b950638fd0f2a69d904bebac86ec79a506e16df6237df1e. 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/CA5KR1805191.