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 0x6fc142e404471a7ada87cc3c7c9dd4c0809ea58710385c5d15eb7308a8b301a3. 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/8b9b76ee-6931-40e1-90bf-f0afccee2967.json and https://artists.proofprofile.net/proofs/artist/8b9b76ee-6931-40e1-90bf-f0afccee2967.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 0xd317e2e3c9310fdd489aa921e03b87bc43d18800820d9e233cfde578949d64cf. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NLS6R1867180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f96cee89a6109084ebb33a9627186fd42d168be486a0e314d55991da3e1f50. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T03:58:26Z), 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/NLS6R1867181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae3f7f50436f2f668306ad1229f92b7ecfd25267ef82a7ab29d42781de11061. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/NLS6R1867182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710f568662f6b834454a936f54c5a7bfa039022f5749569bb16d226f8408e4d1. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/NLS6R1867183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be47425753abc3f3861155f3a54e753ccf914a8d066730095f0307733b8dc46. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/NLS6R1867184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b00d82ba67431a68056b6f5bf8cddf1959e70484ae70d717fb32b415e4ca91. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/NLS6R1867185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d131dac14c6712e080ebcd34fe61e1f4e83a1b7562eaa5cff0f0883b9f1016. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/NLS6R1867188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ccee9bc84365db51d24da5559fb57d690c8747ed037b47622ac9195aa1793b. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZHN72066324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2290d31069b52c18e5c48db214b29f8d35736739a7ea37b37e0f26f79f50da4a. 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/QMDA72176769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1e2e46e836021183b99dbc82e9e7eeacd9d721a32723c4add86531141feecb. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SIAA12000310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e6618c8f896a4a55fca7a990d70bbafbfd1ae1af82ed064277f769160d3417. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/SIAA12000301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12a66c937ce7083dc8eef260bfd9b6513a4d92fb83cc805e440f3ad511cca75. 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/AT2DY2400115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafedcaeb2b04641046ffe1b67f7069b03e4851d8c6e220f33addd94a3ebb8645. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/SIA632300828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b851cfa32692456db74d1a6967a8c7f0c6ef114ee4ed70ee460eaebb0a029ee. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBLFP2470945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89bee52bb9e80ea20e31d32394ba815c7061243729ad65afdc5fa6aed3f6ed0b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/AT2DY2400075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d478596895505674fea226b2a396446b2a454f8ecb2829e40f61a5a923d295. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GX53U2375027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bae14b04e1bc29a9fd3a02dad368b64367b10a4f80d1dcb0c07b28ec5eb6465. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GX53U2595741.