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 0x94aa54aeaa973b9af5a2159a9529071bbbf3ae317a958b137b1d3eeabe4729a9. Chain 2 (Bitcoin): anchored in block 954043 (2026-06-17T04:15:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3f14ba77-ab0f-4de9-84c1-ae0d8ba413ad.json and https://artists.proofprofile.net/proofs/artist/3f14ba77-ab0f-4de9-84c1-ae0d8ba413ad.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 0x7d3f3fcc6bcd6ed886516edd9b6ffff1bb745d6cdc77d9d7df014ee0a0e0cfa7. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZNWX2071158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b564bbe5c33c8bf7b1fae29dbaf2982bfb88e9dabffc581935a5f0fc6ff64a4. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZNWX2071159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4a42e7dee73a2fb34243b7a3fa6de7c0d693fd89da21f560809e535af25545. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZNWS2542607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec11a9c139c625e9ab00f80506d05a3a3e6dadf20ebf91992997bf6962e5474. 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/QZPLR2557004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83244c437419a22e4190a2050bd7c9ce5ad099580bc731b1acbd5c4fd1cc7c43. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZPLR2557005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77004f6ed4abb0b5947f69399f8c0c8567f85e08395db6ceac4fa1d22a839d30. 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/QZWFF2508854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb6f06d42fa1eaaadd3b77449eaf029a672494844c7843d1da32b2d8efe772e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFF2508855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38530f4fd04e3f6ed8269b1222e14cfa651fe9f5b4347125eadd10110d719538. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZWFF2508856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d534203a8c47bf0901b2e4c66f83c7dba45bedd6820fb07a079da801da19c6b. 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/QZWFF2508857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6f3b5f85a73ba7884a0cecf2246c929e39a061dc23b3449206504b3971fb1c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZWFF2508858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a04e172cbb7ef3a57af09752be092d1f0ce58383303073541cc923baef8841. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZWFF2508859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615b91911173abce3f8d464fcf9dd2a34f0e4206006ca9e17bdff72906cd6395. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZWFF2508860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1f422bbf3622f76bc7e8f64f0aa29aca9167cdd54edf5d83c0003dcf3198f0. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZWFF2508861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e48b8ce76a536bdd061baac19d4d0d58544dd01d5854b08296d77659bc3dc30. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFF2508862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890937bb83fa84dec11e29c2af7eb776d3f96358577d57c9fe5eccb226a02eea. 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/QZWFF2508863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe165388c321658ab78794b5f2c2fc01ec0a58453943a86f2abf7d6f38627170c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFF2508864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb05633fd0737e696cc7d937fe60d4feef558b4a4e9c6f1bd9479d6f2456535e. 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/QZWFF2508865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652cc727136a66a1197d41ba928d9ed0a6f18f9eb8dd2ee481095aeee2d448e9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFF2508866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd618106979b8218096984bdd5dd065d72fdc93434b8665700464fa59803b7454. 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/QZWFF2508867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f18d743d44f479a4a4b4aa6972a09fb5575a3e445f24c643ae100966cad6381. 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/QZWFF2508868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d25b322f209ec0c3806e006b7958ef1401ac04c0838606735187a107f5bb9a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWFF2508869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4303262b1d8208901f2062dc0f831dde5969e473255a7b45504e8ccdb3de77d4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFF2508871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15124eebe6488f633832ab52ccacc6fd86cb9b85c1eea6cb2b249850db3cadb. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/QZWFF2508872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2637335675c46921fee3a2e0421d71d4f73f88d1a13a5a1fc63ced7becf06753. 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/QZWFF2508873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050d52d2e67ba1dc954901c0227ee27c629729801e6a437df069c43bdd9242bc. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZWFF2508874.