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 0xbe9f159a6dc3e0aad802bca7b5eaf79a56673e9e0f916ec3953442a846f2ca2d. 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/5c5121b4-a5a9-4980-87a0-53d78003b6a0.json and https://artists.proofprofile.net/proofs/artist/5c5121b4-a5a9-4980-87a0-53d78003b6a0.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 0x4b19e0a6bd09e2c0cb8c1f2c0ed226212bf3a38bde15ef8a4f3270c1f015fccd. Chain 2 (Bitcoin): anchored in block 957692 (2026-07-12T10:37:51Z), 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/DEC959500605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5c439c1a984f04c0b7abb9f8e42f436244903a521a86ecd121cae1a31951c3. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/DEC959801604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ea61415bfa7770c80c4f1633058203d20b4e2e7f359fa2564ba24487f14338. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:22:50Z), 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/DEC959801610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8edd29b26f5f81dcbda560234af93191d71649dfdf51f7b8c8ab79a0b91b649. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/DEC959200134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67bd4600dbd73057251957fd30716ff632c99f6e55c1f9bf5de54fdb805860e4. 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/DEC959200135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979cf32d8573e77842028564d2cc246cbad5f385dfa3f6e03a012ef844f493e2. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/DEC959200137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd328d19c8379523a077db1270de8afdb686f37b9deff6bb057ccd538d95409. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:31:09Z), 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/DEC959200140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0202f04433e0aeefe26b8aad3919530b9441ebc3d0f120e5c11fe963ee495a. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/DEC959200118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0e41a54ec5ae61c94f6fb90f7dfff3fa870e032af4b52d775e4dc1853386ed. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/DEC959200123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2025264886e70a73fafe1528f0086497f554d8c5e3e89e2a331b8d8b40fa0341. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:05:02Z), 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/DEC959600161.