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 0x18a102e00b2789dfef966225428434b94f396d697e835494222f45e8a60753ae. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3051385a-bbf4-4da8-93fe-d833da783cae.json and https://artists.proofprofile.net/proofs/artist/3051385a-bbf4-4da8-93fe-d833da783cae.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 0x5cc617c3209e46ba28f4341b70445fb0406e218a9cd6829b881b021fff08da04. 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/QZMER2416702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6e70995a73b49114df150511eb7b86d3ac1e1be53e5a6709941c57250de8e3. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:20:33Z), 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/QZNWQ2484123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079f0042bfe72b02c38b43461e5d024987a25f6b8d375a940907bf56d183e044. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZMER2428423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53541ad00bf5f11ff7c3a7d786a3be6b9ebf7a3a75739b63dafdf45730e54ed. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:57:54Z), 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/QZMER2489279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a5da57b9af96b5d724dc72e368fecae869de0a1af841aad32365f1ccba84fb. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:16:57Z), 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/QZMER2498489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90a3f9cea9b7c3dd02ddff0d30b1541c6799d0600edb02e436c8bfc1cf68997. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:55:56Z), 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/QZNWQ2486294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f79eb993cc254e91f994ca602bc21a91de557b614cde365f72b8db6ac6acf1. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:03:58Z), 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/QZMER2450864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d52fa0b625e4f6195d69329fbea13d74a52c2e928f4a5421cf196276dffa1c. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZMEQ2414729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6fd40611ec3cd1b568e0656e64d411f04d498694915130378002c57287cdf3. 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/QZMER2437648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032c6dd4c35f57738a116c8d4b5ed9f461da61a1b0ca2d3e80a02a9337079521. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZMER2407665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c2a2720ad39006da1190249adceaae41360e476246da5a1cb29356aea75d75. 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/QZNWQ2405279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12394c87a00deebc33e233dfad84705466213de6f6c790e5d872d9f3ad153310. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:02:20Z), 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/QZMEQ2412322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3dd1abf40f2dec1d934d74fc47858fa79fba19598c31815b5148a69cde29aeb. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:55:41Z), 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/QZMER2429578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46cb3afc3f1b324ee5e96593c3def6ece98dea06b7008584c00774a2c8de5803. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:11:16Z), 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/QZMEQ2424363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86cd780eb8dca5bd63d58fb2f1462191d6680dd3981ad92aefd04a5a9356d62. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QZMER2455370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0993fef6fc375f5ecae5ae59df89b6b9ae8af70ee258f4b2a28a8522e70f919. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:40:54Z), 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/QZNWQ2406489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ac938c7525005514d64306dc2fdeabd65edded2b5c46ff72e5fb0ef82ce425. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZMEN2463318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8cbf2f64f696baa9f8a6bacb0afed11f1f81a21a2da5e9519c30dba15df015f. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:01:15Z), 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/QZMEN2491104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab78be29f367f99103c72f8b10e3eab9c4f5d82bb3e27fbdbf749d25d09a510d. 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/QZMER2433287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2e61ebfabc8a983d1b9a38f64cbd8456fdb1a7fd70e4b887832e61027a860d. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:31:25Z), 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/QZMEQ2459760.