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 0x11c027e5db4eb6f1a3cf0311d22d63a8441c9ca9596f6b1c35b02a0ddb5c4bfc. 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/f0eaaeff-06d6-430f-92b2-ed40b95738ea.json and https://artists.proofprofile.net/proofs/artist/f0eaaeff-06d6-430f-92b2-ed40b95738ea.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 0x60e2234792a6dc47559c3cafa9a5cda1efc172aec10996d627c5838ce0c118be. 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/DEHQ91647703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c7a1fbfef2ec0aa27d4efef3ae4a29c1c34e3691f0b262fb62f5071612753a. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/DEHQ91647704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcede593cfedaeb3cb0aea884be9e2d30acb2ab2ec3f85d263a37bafaa8ffcd2d. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/DEHQ91647705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7a9e54e372cd27edab198eb01b18cdf785e63e2e56e4a708c74bdaad3ce7c6. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/DEHQ91647706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1769a2088f06d8f037ae494e0d2c4252c9fb3143c40e98dcb336f903c4a59799. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/DEHQ91647708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1dea33c791ad5d2554351e17a57eb2791e3dbbc5ea210fede2f7d612bb2b78. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/DELJ81822660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba0ed21ce36119b590179e90ecc50cca028b8ce11d3a9fc6dc05e70e890c4e7. 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/DELJ81822661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf76d1a805dd907e05413e1653fec3aed244c6950dc61e44bcc9fc0d6a3e7151. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/DELJ81822666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f30c3c4c9c9aba09672fa0d489886677b1c0d957ade82ead3fc5fb2f604323e. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/DEZC62157660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3377f0ac82d62987018e5e5dfee1106ddadb8aa9967c39d785ae793d6043cec4. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QMEU32310702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2079add44b55830e9896a577247e15f35d7931ce2b35a338d97c0a9974089a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMEU32310708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2878df0573d8356f5083817c19903406c6c87f7f4d027b78a2532a3d12ad0428. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QMEU32310700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579086b64aeae0c060554f6244465f66d004c82cd007eece45932522efcf98cc. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T07:27:32Z), 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/QMEU32310711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039c0361cbdbcdadb7e876bbf1bec9097b50f8dce6dbed11e6e0bc42f4de3cd6. 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/QMEU32310925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6773cc1e54acf2c1210d71cb58025ffd687c8b230cb08a469a994751b68cdc5f. 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/QMEU32310926.