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 0x40fe947a8f70754681b29039e1007b33f9189a9ffdf58552e5593789f252d46e. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2a82db72-da96-4c76-b380-7aeec1d0f490.json and https://artists.proofprofile.net/proofs/artist/2a82db72-da96-4c76-b380-7aeec1d0f490.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 0x8e594f934b75d16f4e8088c1000b51d9f87dc56a32bfd1f7433c79ea9e8adacc. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/AEA3A2315172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa450730f59f7e5630527174d1451b9f03d8315c3251ba5b4c35107ed2748f300. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/AEA3A2361948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf1a87b2fea246ee26493bc299aa22a8d0d83f11276d49cbdc6f86db0296a20. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/AEA3A2364835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf0ed5ac5b916b6887ea55b2f3e97c6ca42ada0e6d0a623253648a6495111f7. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/AEA3A2385847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bca27c69c984e5a40f4cf284d1725bdc9baed63dd99ca3d7da9579b44f3c5dc. 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/GXD7G2280809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c6a538f26fc4025f9380e7eeb98c8c33e28c4c0d1506b14b1fcce1b5429886. 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/GXD7G2252226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347bc84089c1d0e7ea3d23376b080aab6aa61a013100e7ecc41a88b912b48305. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GXD7G2246805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f65ceae34e6b1c02a6f75a065276614fdc702611c1ba72e92e706ec1c0ed523. 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/GXD7G2271980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4cf881758a63a593e6a525ecc67b7d9f2cdeb26484a120c7cf55e5115396e4. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/GXBAV2524578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8a33b34e21ef9249a83498e0122c5d62992cef91eea25522a3d5096fdd1401. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/GXD7G2591142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e0e17db02e995ec3f87e8940ea3b84eaf2a6d78a347b18e044781fe78a9f6a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/SGW502589684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd153055c4603d8dfdc4f22dda918a30fc8740000779d9ba39f5900d21373c9fc. 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/AEA3A2545271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3271e2fb9a9a00c8bbade58027c2653cc468b1e25b8af2e8a1b9b79cd99c3e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AEA3A2515785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04bb5eb78e8d265a566a4251ad2a7fd52d6af64b7fe5f15f7df25e9308b764d8. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GXBAV2067171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1055ab9ce51dbc7288e57608bb59dba81fb44ff2e71a5eac9f13ad5df812f949. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QT5M22579267.