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 0x6d11feee65704ea2326a34f6392e39b4ef1b07694490c076f59adbc8c2b054da. Chain 2 (Bitcoin): anchored in block 953860 (2026-06-15T23:55:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/03045451-57f4-4452-a688-25dd124b65b6.json and https://artists.proofprofile.net/proofs/artist/03045451-57f4-4452-a688-25dd124b65b6.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 0x2ff2612f5b8f62c93ecbd8aa2faebad940a1d64e341a600edd1ff1c27c9243d0. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QZHZ52296115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa619bcece42dd5adf69793cac928a2855b26a474241b7a3cdfa7a6b1fa9e0331. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZHZ52296116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1aaf592cca8fdbb28282a9f4ff8bb4b79c795d6b28739a5f4f1f85240a347a. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZHZ52296121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f67275d5047a5ba57b23aba596f4ccf521b6ad09202b11316b6c588811fc1e0. 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/QZTVM2168051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb84a8295bbe9746390b5d08e354fc63241b89e1a51bceb32f915b52ae496fb. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USA2P2264958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0344e6fb107a5c274b5b5746524bc9794ba270212c15ecd331c9402be423f2c6. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZHNA2383680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79febb601ea505e5dd3f0f178763cd76c98cc942c99ac56de1cf5dc24b0a87dd. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/QZHNA2383681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56c074561095f2d061d2632f24c6900ab986147bd765a0d15cdbb060ece08f7. 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/QZHNA2383682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c4ae330c0aeaa5adc038e8919c6d262c93c9207adf062cde0098ec60818a2e. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/QZHNA2383683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f478e3f9e8ff603fc5d1ea00aa103eaf6c6936116ab2ca49c61878db68b1ee1. 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/QZHNA2383684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62dfe1b13afbb2715d9c93783d0bc6ba5fe44ff6b2f4dcfd377216478d46dd50. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZHNA2383685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf217df57a14b6ad896fbce5918d66dc2702edda991cb1649aa890c32a7edb8fc. 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/QZHNA2383686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b146d89ab2ee1171613511db9e98fbe4b32ac606a79e77591000a4be5ae743. 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/QZHNA2383687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb981944e8000562912552602ad95d1c7d6d2eade874c6e2248cad5c639b146ef. 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/QZHNA2383688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441f38fe01def68dbb8b4d8df8fcb3964652b97082fde21e42172b1c935878be. 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/QZHNA2383689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa75f99bcb8dddd5a770ca24168827173e55e6e404dd18e71c85138bafa00209. 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/QZHNA2383690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50041eb56583ba167d38fa753d50f5ee202b72652ce516cc569d3cc92489e5d9. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/QZHNA2383691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc70231ccf7cba192207525d579135fd405acdb46a9c361fbe5d39abe122eb72. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/QZHNA2383692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0546cd5a8893b8c824f81231462217e87ba3b4a9aefe4ff092eddc1819d2aa75. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZNJZ2115281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cad5f5e9f8459faea4f17c5eea959ece0f18c32cd02f682719fb8dbf33007de. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNJZ2115282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab24966de81ac4c07dce7149c23c2cdf0a6938977747555808ef32979be5d4c. 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/QZNJZ2115283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270adb4b23cdc72b1326c3120cf770c76d37c8532d500715e4fa766d71218bf0. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZNJZ2115285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ba0aacad952795e40b3ce3bf8ce95719f25918cce85aaf01046bb2dcbfa53f. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QZNJZ2115284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bedb5e888d679f811f467e274581e302537bc0684631d5c251cdbb28499c3a4. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZNJZ2112252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5085dcafa8eb05725116fd071b0740054538439a5c00e006f69942a255cf46. 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/QZTAY2229857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3df8af2059b584ce6792ec5babb4aa5291df4ba68035c975d01872e4d3d6789. 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/QZK6Q2269875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9587f95ff917a605775c178e06f4eb7aaf4cd3fa79201143bb8c45d2d073ab. 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/QZHN72379861.