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 0x3cbb71e6f249217dd0bb0793c3fc2d0d662fc9352e4cb31c38d521c867d98b40. 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/e45d51fe-08d5-4977-a0e8-2fe06ad9c30c.json and https://artists.proofprofile.net/proofs/artist/e45d51fe-08d5-4977-a0e8-2fe06ad9c30c.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 0xe642c7410bf10ddffc9103dee055cbe978b78e346fa54edb37cdcd38194a1288. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM24S2007750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14fababbaf8be6bd18ae944f88dceb40f9f2d8cbd1c400441fa4e2dfcda27a08. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM24S1847078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f4c8578c4c2769e0eb0b2f379bd5647e30f671139b0817298cfe13a50fd4f1. 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/QM24S1847079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7776e655be89d1b3adfa0b128aeb26cd0540b2ec3f6677339355a012e20e0f77. 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/QM24S1847160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b70a5de9f6f224c34306e1c6a257df57991659a6ecb74342ce6faac999ea7f. 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/QM24S1847161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14fababbaf8be6bd18ae944f88dceb40f9f2d8cbd1c400441fa4e2dfcda27a08. 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/QM24S1847078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76637aa37e83a2a5f348b370ccdcd7b59c8332ff3ab6e18eda95b29d09754fdb. 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/QM24S1847162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd743d100d552901e7c7e47682f8fabd2c55217d184e788b5e330f0c6efcc70f. 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/QM24S1847163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0825275e282d2df5ba30083c3893be48f9094ce81c159f712806e3497cb710. 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/QM24S1847164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355657930e76e5456b0ed7e00b04f5587428620bfabe2c46bfb7e1ffd9a18c00. 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/QM24S1847080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca06986f0e3169884348dd28eea132363352cf67c4bcc0d0e1510af3ac4cd970. 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/QM24S1847165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a43311afb16b63b6cbd704bab5223fc6b028e8446e2a0a2d8a42056310cf68. 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/QM24S1847166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f1a7a58ccf5d6f36f003ea1f2a88a5b2f97f490d8b6f9dcf2dc0607fa629fb. 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/QM24S1845649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ded7f75542c774441fb1a6ecf58cb266512590011707f32302e4633f11262a. 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/QM24S1912439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c8a95fec7b999825f9ccd62404c273a3a4f59fbb6a49ceabda9076bfc0bdc0. 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/QM24S1912443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc04e6043b9810d780566c25ebf2e4db208703d4fd07c1305c12d7517db1e8c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM24S1815336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e4def7a29a695da2053b71b97bab4dce46dca5bd274c25a1f36d17e685e8ce. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM24S1912448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58417613e06d089a77b69ff1d98a6f588290f0e7ef9988c11b4eb8c056b972aa. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM42K1759184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42aa593f1d1a24ed9df5e617123ab2a27fcf3c443ef19b1eaf915ba579f252c. 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/QZMER2128224.