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 0xb2bf1e7fd07d3e1e257de0c7a8162693ee62fa9cedb51b3e410951badf15f1a5. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6be0d58b-41b8-4372-bdb2-1b3399e0c61d.json and https://artists.proofprofile.net/proofs/artist/6be0d58b-41b8-4372-bdb2-1b3399e0c61d.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 0x81ecf427098d7939b39b0c85dc0700fb103e8cdee2c1adca4859bfc30184f6af. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DELJ81957809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7285e5e1173232eb6cb43446713c33bb22a6bac8e1eef1f6ce6b70778c97c08. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/DEQ022009948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8836583abd291a090d31d5fbf83bbf9ea614bec1d707c2fa39be4b6fbf79083d. 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/DEQ022009949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ae21e2e21836c5bde23cb5830baafbf8c28cdab61055f627cedf4455a6d030. 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/DEQ022009951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283b8b51ae62e8dcb7483d1210a04099f3cfdeaf43e0372ddbae0004cce51181. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/DETM41610858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac17b17f8e696c1c6616aade13389b3d2644df7802339d812903f6230fc704e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DETM41611189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb257e7e2a42922f9aa2ea4693758df5c53f25ad32b745b7a4c8a5e8604d485. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/DEY471826998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342f145290604a1c800edcd018fa6a66739927146bb6092258cf058ad8e1a6fc. 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/DEY471827000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675417d75ab3b2e224e5f342fda244ee7b8b1d1934dd0c6966063c75b2d03889. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/DEY471827001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d465a03681dea04f03214de0bb7048e9eaf905b39aa3ac87a4148dbd1c4bfbd. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/DEY471827004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c0052497610c1f62d1f221c8e2eac484ba19195eab16feca80b897648ca616. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEY472477303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731140ef973557beb327830c8f2852f0767bd1e35fa850ef5df10b80b5126747. 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/DEY472479001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b04cbcda405c84aebb61a9dc9b83b695d358a7e036d172df783028057918172. 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/DEY472479005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40dde0bcdcfcb8b1d4cbc4323a4ae6628ed3cdf6c00b89bd9512a0dde08bed7c. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/DEY472479008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe2e5c0ad13fa1afcb35a682f341483eaef89ccb5329e0cea7996d1e226a67e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEY472479009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6285efccfa1af16a7e46bb63bab828840f324c333f72cf22076c37572cdfcd66. 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/DECE72203604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79814fa5aa2833f1e06c6a640536c55c602c27528bd764f3022d26e8fb5c7c40. 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/QZMEP2158105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3c99e7e63fccc20b1df2ceaeac58373275086128d3f5d87278850911e613e8. 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/QZES52294003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be94758d59f7857daa394c1a22a1ddce3ad6f086d716ce7795eb1fb0e31148d. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEKF22200508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5506a289b233babb439c0ee80f81ccc5760e03d382ddde48d5037e638cd23e69. 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/QZDA72513342.