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 0xa1e17cd14d500e05cf1d254dac1d6d02626902e64782fc785fdbb24ba6b9cb40. 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/11e95255-0502-4697-b97e-fe565f9e464f.json and https://artists.proofprofile.net/proofs/artist/11e95255-0502-4697-b97e-fe565f9e464f.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 0x9d5f2d750b725aaa072515a701294dbddf84b36f7d356b7b63957a4d8937a48c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:33:38Z), 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/NLA630102017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1798e5233a0c96fd17f1a5835f1928c61bf358abf73efd2cfeec04dae21eaf3. 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/NLWF31400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882a95fa7f0da33287f4ea417cb49abf49f7395e5b7ad1d899768d83e699602e. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/NLW2R1714752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc92b8893f088c096ca20f1bf6e01279da676b0b353c3edcb8b0c9b5403b7ee9. 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/NLCN51800037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5b10bca35d765057f6f354a799b38d8d8e38f320703747904c3dc4578119d1. 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/NLCN51700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e539fbbd6f5c9f887cdc8d6971003b755f15b5e5d1bd70847c8bceb29e88d3. 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/NLCN51700061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5cb94a96f8a8a8833e4a45d8136e96c1fab693ad8bc55d680243bb68a73127b. 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/NLCN51600017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e2f31548760ef0fb9f3dfc7b4f0891e791222ef7fd4d0beda753a2448821e7. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLCN51600097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ee1021d56f13aa9b0dc9ff42aa2e977e6c2da729cd76b9fc1317971bbfae64. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/NLX091904025.
01. Kom Dans Met Mij Colinda (Versie 2016)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303b800003adf3f7cdae08b4cf6297a4c891588328c553e739890926a58bfa7e. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/NLX092300104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0a6d3367516cd19b41be305f7aedcd18eb1974484acf2a372e9a41b094a41c. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/NLX092300109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19965b1197d35429ed88422cb5898f0b932503d2930082007455a83e49c7f5f. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/NLX092300141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb097dfbec329a87b93875bf9a2563e4f0de1a5a741378c1d2ca4f36a392a7151. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NLHA72200046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c8e2fd3698d27f98427d2d01993eb37f36f847784ec9f1fc1ba8ae45f828d0. 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/NLX092001122.
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 0x8f01b6797e64968a018a2f524670a61ea0578c5e0a930d705fb3a29d5f6d9a47. 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/NLHA72200106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d03d5f32725289b94c7ce2bd1e955782e1701e16aad3fdfd83c5afe05abc0ed. 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/NLHA72200063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3811f58c9d4e5ff6a2f5bddaacd470c3be6493d12fa325619ebf808f8ad211b3. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NLHA72200270.