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 0xd6edec5a6d72134e5473c30e2a973b0b635a9473e5dc693ad1b3e4a90dd1b400. 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/611d26be-be25-4787-8db3-6e31c2b47855.json and https://artists.proofprofile.net/proofs/artist/611d26be-be25-4787-8db3-6e31c2b47855.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 0x33008989dc9a62adfb449db177fa297d8f450255037024b2a535927a675a3013. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CAN112400684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34207535a2d4b9ba9ed72de0c15bbb74426c3575153dc4671b5b5d0c289b4a15. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CAN112300725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910ebdde4ce448aaf027d3ebe381155b9600eb1c2fbe8fbe0ee89a589a8770b7. 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/CAN112301492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29bf861148e26afe86048a7a53248c16d188a69bac3d45a46190883cb25a9e6f. 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/CAN112301027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc708727e860cbbb781d2805723109dc9a764de99d0500d2f270185881ae74328. 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/CAN112301495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2374880921c984dc80e033026221bdaae66a222cba77cf61db3c093132038ca7. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/CAN112301493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48568bb34853f9a4a72f4cab0474da30fc06f8e71c66c81ad2df4627e672629. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/CAN112301494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2374880921c984dc80e033026221bdaae66a222cba77cf61db3c093132038ca7. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/CAN112301493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910ebdde4ce448aaf027d3ebe381155b9600eb1c2fbe8fbe0ee89a589a8770b7. 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/CAN112301492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29bf861148e26afe86048a7a53248c16d188a69bac3d45a46190883cb25a9e6f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CAN112301027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34207535a2d4b9ba9ed72de0c15bbb74426c3575153dc4671b5b5d0c289b4a15. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CAN112300725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bee2955580668d1d96ebcb6fcb7e248adc1ccad5f86bf7dddd087ef1533a682. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CAN112201102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98a68bf4e96a754223e8d191534d43cc8c2994c78ed624b707130b99047fd79. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/CAN112200649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68add5c06ee4cde3dca939fa3aa70a95fce3182e7dabe6164d68aef1a5d0f3f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CAN112200650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12082e94cbe8d84ca21bbe5442da962de9c442e81f52220af4f671666e943157. 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/CAN112200648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67951ab40830cd7044b2f7f7b4576f59c653aa84d2a6bf1e150513c3d9eb0b5. 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/QZPLR2107479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4470ea3fe1f49dd3f08b9946b5acc138d32a7f83563810596111246361f29b. 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/QZMEQ2150628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea867f4719482bcbf685edd4dad2ba23debdefce54df4c6eebe226e89a06783a. 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/QZMER2013262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e33074a6a596b4c33007e501ef86c9845ad22b8afd54a5339f9c47ce06720c. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZDA52089281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7800a2e9d153860300d7fd367def0c35731e97cf4c6f75f39a5d46737c6bab. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/QZHNB1977711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15927917cae44fda22df87e62cfb1b6b5e16dccebc118e4e4c7f4bb598ba7ba. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHN62221212.