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 0xd9e1e1b74bbd8f1404049a347515ddd8ae476c115f751c592bbe4254d1e37566. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f2a4ef9a-e354-4250-86f3-84254d968919.json and https://artists.proofprofile.net/proofs/artist/f2a4ef9a-e354-4250-86f3-84254d968919.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 0x2017797a02f91bdd2442d1b2b6d3b17270ccc697e3638299ccc48fc68761163c. 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/GBLPF6783700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9e4c0ea00f12d076d093d691728adc9f1e2496199737170a401c718bdbfda9. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/GBLPF6779033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3ac4163f5cd79f193d1eb216fc2552ad84ec6f0153a6e4231784b03ff78c40. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/GBLPF6754615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40038b01237dfac9e283e2319d2d29def004a260550f23389439a95f06a19d27. 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/GBLPF6734833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdccc99c0ccb34accdb90a6ea48407dc5504e4670b373cf0505b9520544961a. 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/CH7812228198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb86bb36718eac3acb9659b1fa45a751272cd08921a5ed1b8771ed33ee7011f. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/GBLPF6722116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28903638e69663a80e69febb91f43a57314892c537a79a4d38f5f89f4242197d. 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/QZNWR2060320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06c25aa7db6ade505ac5fced89bed8a5a1f3f660ffb0d023dc9d9c3e8de5367. 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/QZHN31904935.
Der Er Sket En Uheld (feat. Jacob Ditzel)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a79550f2eafa654b5bd5518cb0fcbe476e4cb9ca2c97e1889e5a41ca6453c9. 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/TCADF1713674.
Morgan & Cola (Re-Mastered) [feat. Hoffetv]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaccc26c3c0fc677b66625904bfa639c5dc5773113d3b26ce93f0d39724d9a9af. 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/TCADA1721664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71319c2f2d5a8e7caad18a64908dcac899adea1540f31f731a49d2e57a82872. 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/TCACR1665930.
Morgan & Cola (Dalkvist Remix) [feat. Hoffetv]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a41b1127487f721c87d89d8cadc0c98ee26d9f63a3340fcd4341ba86fd31f60. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/TCACN1622077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8f21ddf71f150508047978231e9230b390e4e722a35b05a076a49217978a3a. 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/QM6N21910156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05821cedb2051cb56243683f082965cc8b08b0d966bbfcd9d902e3fdc7b4425. 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/QM6N21910163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49f9b6fd122c4f7b9e5c000747e2213d9ba7a86a8a1d4adcc1e7fde5df70cb1. 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/QZHN62534489.