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 0x50380413b95c7b575029bf98a0f367952d5f9ae4072aeae40de4bdd9d18a4d4e. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6c702e81-db19-478e-b1fe-99ba36447e98.json and https://artists.proofprofile.net/proofs/artist/6c702e81-db19-478e-b1fe-99ba36447e98.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 0xf00e1b56592ee8903d4a895fa2bbcc2c8f0518319d9038c93385779e3ee8665f. 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/QZHNB2485611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc548574a3657f1d99158d9c3f315e64bf4efc0656341af5b0815af8a9ef1e9. 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/QZHNB2485612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88e3f370183e1563cd290325249d61d2e107ba16d1926f41e43d6652dad9d13. 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/QZHNB2485613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c691b8d9aef10e708b29d3f8247129d632cdf75aa702a37bd7d9bf8ca55758. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZHNB2485614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0094eb491cd57b596765d97c55e26e735d7a2bae8aa729c85030cd2dff91a699. 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/QZHNB2485615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e8a21dddaff78802dc78077b5fc7ab12090c985233df63593704f1de36d01f. 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/QZHNB2485616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ffca697f9b8bfc2770f613e26ebda689dabde43a5bc18b86b79b794a414d84. 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/QZHNB2485617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0aa4ae6b2615b35de7e65d4b2778c7a0dfa13c6c9bff0e38115f1a403892b78. 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/QZHNB2485618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a06fd28fcde535fb2095dfc1d45a88c67214c184cf4aa1da6f1e335135cfa3. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZHNB2485619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f2722bc28d8836383a2cea50ae1cce27116522e1e11dbf54287664e56a27be. 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/QZHNB2485620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3106d4cd78a936dd1088ab5cf8000330d65906bdaaa44ce5d3e170bdb72200a3. 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/QZHNB2485621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99abbad7305f0bf137df85fea99ab62940b74567d851b941c50cdbe7be48b364. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/QZHNB2485622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7dd74f6d8cb6261380e417aace945056d837a57bbc0948f81503750513f646. 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/QZHNB2485623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32eeca38ca207bda7856f7e85d23441ed1ca2439a208f4e4534a3ee68b040e6d. 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/QZHNB2485624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f13c68c594feacb017f6fdf4354cc8e0228542c0b6aa00bd7e193bb883f291c. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QZHNB2485625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf978f159531aef538babb0def9a9e8cb919ee8505f37a72e8501aa831c210fa6. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZHNB2485626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef06bff34fe4f204aaff05382adc469f60244438bf0193df8bdc70112a6e5ef. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZHNB2485627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af98e74ccc97f9fe16550e65bcaab99621957adab9d2cbdd8cd940fbcde8c0e. 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/QZWFF2402490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8755737ea76df98f3badf8548860821f2e88396969778ee662f2af0f13af21. 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/QZTBC2478169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7abe03823af1f458ac00323cb7a6c2e4a240f607aac8b19ba4eb43613ebc5609. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZNWR2407891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2089279e28fffd828ae0b294708155570684bfbee64dab681f64cea502392e21. 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/QZK6L2303073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80443e84697ff3767dd511a90acbaccde6ecce003ecec524a4c211284be9ac7. 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/QZTBA2453176.