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 0x8791b7a0727a17eee1ffcd702c9c1d9d35b8faec3a1800579a6d485e34140823. 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/5e9029c0-f68f-451e-abb4-9636c64f095e.json and https://artists.proofprofile.net/proofs/artist/5e9029c0-f68f-451e-abb4-9636c64f095e.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 0x9122fb55eec822be70028e1537631f415bb54bf4f1b64fccc136f2988bbe5afa. 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/USL4Q1817762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61862a92111da622e3fa84db8edef27b635c51139d3e08db297af13c48aa067. 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/USL4Q1817764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c064020ec602db6a99c9d095367b611e793b0942854b750989925d82887fdb. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USL4Q1817765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0391fc4fa187a96bbc9dadaf6a23b835339f3d4eb1af722c78b4b1092d28beec. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USL4Q1817766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1701f0dd75eb2d968a5ecb258f0794c81434fe0f9e8d6b5a9014168e37d1f6. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/USL4Q1817768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7771ebf7a9d84b2e507bb412614091c2c6a595bdb3b26f77e325655e86f52621. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/USL4Q1817769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc557c028e4630bd1abf40f273421ac8848bf6301956e0431c7d1627a2339797. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USL4Q1817770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a507ea87942849f9825e0f1066d379cd6201652d13c91b6bac2351314cbc03. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/USL4Q1818220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06cf5b05cefae5ed5c4ad022f29db56d5e0d96ba2f327dd0f35e3dd28270ab4b. 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/USL4Q1818224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029d8bd48b6ec7db121cf11cce9ea559bcbd6a1dd5a88a4ee4b7332352c86921. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/USL4Q1818493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4173d9deff8f0c763b7d978db21becfd7582c33818213ad38899555a7aca6746. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/USL4Q1818494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22079693453011b3ff14aabeb476990b111cca4fae2a1a177a0c260d1045fda1. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/USL4Q1818495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1392cd2c2f758e6104ec2d0bb20ca9c3311de2814dd7d0d99f88c16372f83109. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/USL4Q1818497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6733e55fc986f75bc8261b0cfd7e97192469b0ec2dbb8856f62a0217a9db80. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USL4Q1818498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5f4db3936cffc14c5937e1549bb0e58ae203f743119f8e0cb0a69828281ab2. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USL4Q1818499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e10a6387aac5a2784b34574f6fd9b7036325e5be19669d7adf535327a081c9. 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/USL4Q1818500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e470f885b9e1529408806011951e75ce43b38b57860b44e992d0ba57a9a59d2. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:59:12Z), 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/USL4Q1818501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f978b47e1349157df81de6984c53c8f5570168a845dc6d1ef03c2ac304f0899. 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/USL4Q1818503.