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 0x9e065ac43618f5a73f35e4debcbf41c222aa6726d8767af5c9d1155a4001d454. 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/de696b58-dde2-4c81-86e9-d7b6c33137c3.json and https://artists.proofprofile.net/proofs/artist/de696b58-dde2-4c81-86e9-d7b6c33137c3.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 0x19794d7467bbb70107e1a3f452f390d62ad7a36af2e2cb8cbb23b7c4079c45c5. 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/TCAIT2412714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5407717765a771069c28e1ceef34a76fdbcf9c7e4914613fe3f4dadafe0dc804. Chain 2 (Bitcoin): anchored in block 958573 (2026-07-18T15:49:54Z), 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/TCAIT2412716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b5c1cd17e40a5fc09fbdbfe04dd644e0f5125faefc3ea166165810b818d78f. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TCAIT2412723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65202b0150704d75cb343348c48f89b641eb6cc1c68bbebc553c7aa6058454fc. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/TCAIU2412727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43dbfc9169943b2236a58a013f28779058657548f953bea00af95a779ef7afa9. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/TCAIU2412729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1dcb37c2b1f911595d88c122f60b69758c41f61dff4d77841836285f541c65. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/TCAIT2412741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdfdbe57e8caf3d8ae0eaf36609f0ca17220d13e141dbbbddd9134da9e3fc229. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/TCAIU2412749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ca7a11f7c6400f45f05bb0ecec0b8ecd3a2424b57f2cb000e13ee86a266ca0. 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/TCAIU2412755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37d12452a238ad4aed4beadb251c586ed832c0fdf3fc410563ab95191929427. 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/TCAIT2465226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6f585d184d48988cfe6ae7385b94c85beaef709d8f119993be08cba9e87cec. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/TCAIU2465227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22e3dd0b29e0768b87aeefb596b6daf7b757283068cf336ca0ad9a085db30bf. 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/TCAIT2465228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7464845bbc84259e07049c272cb2d6b8c87040342612336673d5188013708eaf. 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/TCAIU2465231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc4dd55ca05cfd0fc75e2f8c8a8b38a7453dcbcc24479a7ad49b8b2af0c5aa0. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/TCAIT2465233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3f87d0e00d3dddda8f695d227f6c71d2cc5ecc51abaeb3ab54b5b1e0c61dbf. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/TCAIU2465235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6500c570a2ed32e39afc874900af261486c0ad05e982b0036991dd2d59b09ee0. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/TCAIT2465236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25956b5310c38d00a768e156c4837b7193ea0b60995bd9eb76ec90fe47efbb36. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/TCAIT2465238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb831773de2a9ca590e45d4f672785542298b5517a73d6ce7074503091ab870f. 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/TCAIU2465240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf52459023f1c9a678024e4c3d9ac0d49bbb5600ce1dbb8e00ee7bb20fc4beb. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/TCAIU2465242.