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 0x73419852e3a865fc737eb251ae2d67aaaf89e6a8c365096405c9caa43597eca6. Chain 2 (Bitcoin): anchored in block 953701 (2026-06-14T22:16:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/768ad3ad-a73d-4048-9764-81672c03e2e3.json and https://artists.proofprofile.net/proofs/artist/768ad3ad-a73d-4048-9764-81672c03e2e3.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 0x8c63e32bceccc4aad63a82e4789a07c9dde164b53da63c5d29b57b330f2428a3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/UKU932430469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4caaa41ad096d3829e1cfdf62a681acf54d729741ba53510322f7f7460411a89. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/UKU932430470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1fbc161c920bc8cb3a6407568158342bfb84b5c2edc601e6309798a6b082756. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ITI952400080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8b053f202e9cd13142f7e0ca0eb14e9dd8b9c22ad503e78819d235b2c73c85. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/ITI952400081.
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 0xaefe231c220bb341ae9e61b1817dc928895652036f2171bc68701934c9f6f4cd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6P2457990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde4664faf42e3f4d585a51d4090caed6eac3260439967f2f5ed97f06fef7e3f. 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/QZK6P2429464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2e9fda4675707c315ae9ffded1d4badaa55f747ba665e00e8ffa5829feb0b6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBLV62313013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd859550e9e539ca24d30f0fdaf4d01d21efa4a5014511c51c8ed4330b4be12d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBK6Y2251131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb215d7320daecf9f424fdbb194473fed49948219e542d56b28f2b59aab710d4c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ITI952300059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c4e8a87ebfb7cb65640119af823539dec1fc44be369894c02f652c69032db5. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/ITI952300058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5457f7f1e96918a6b253dd9297116371966b991ff301940afad9434bf01577. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRX762303284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7337d11da15615d6b4cebdb0bd0fa4326e8a814e3285b00a22eab86f38b103c4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FRX762303285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0187ed303db5cb022d9cf4ccae6f3359dfb2a730dfa6c5a113df09eaf74b2dbc. 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/GBNUQ2300756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21fdcd390ae824986d0106ef8475808f8b94ae831e84b3d310e349926c8ae351. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBNUQ2300755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1034d128c0ac966c6826da9fab0799138a115ad5ca3da09c5b94eb9ff87cc6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBSCL2235050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6dd49d11a664818ea7d91d2c3394725de0afdc22c9b408d452dcc5eef89cc74. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBSCL2235053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c70d44e3e27b6829103a18c0dfd3ce2e089e238dcc8144699a9fd4fc40da514. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ITI952200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1025ef5b597fbfa71603189acf791dc950a7bb2a00959a2ef01ba26893b0ab7a. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ITI952200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78fa2dd40a3b99e6481292c58adbe165b2c4055fdaf27eec22109db8d127175. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBJAJ2101085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9237304c2cae7a3e12a984c61dc2a6b5607ec09ee8aecdcb3abc971b9b35c316. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBJAJ2101086.