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 0x0cadbb8720f125cc25cbc5443c02658d14535b9046f5e6755665bf6e7c72adeb. 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/2cb3a52d-1b99-40a4-a963-d3269152b323.json and https://artists.proofprofile.net/proofs/artist/2cb3a52d-1b99-40a4-a963-d3269152b323.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 0xc79e822251b97629ac8a91951309af2cd322486d40f873f4dfa1e06a021b26f3. 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/NLL151402133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda60f7cca71c51c5c23bd55a1182b5b6e5327b63c9ad8794a02be913d2c10076. 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/NLL151602497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f6ccfd5e759277005762f362a4781d2fc8b4036f11935ce16871b57d270e8c. 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/NLU9B1700028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0389459392b87686bbbc01bba5b191884acef2f7e204e1f3bc96394e10c544c5. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/NLU9B1700030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba644adfb6eeec77dc829fb6c846d5e3704f02f89b68c7cf73745d699d4f60e. 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/NLL151101554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7f809b933c6412a9f4ffd68ed8130963cc978d7d1865d8d556297598050016. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLL151101551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f8930ffa3d050d89048fc66a7d003d2714a3404cc11d679efad5ad7de74305. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/NLL151101553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06560d5be32466d3962b3e9d8107cad694764b9f72a337ae2ceb42c568d9a932. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/NLL151101555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e5138db889af4f336bcf97c9aec8025b8f15ab63ee686eb3c66ff1fe889921. 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/NLL151101556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7141deba68d4897cd430a7401d146e82b895934d3cd50a68cd2993f15db9ba98. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/NLU9B1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5e6dc20c9d14b73ec8e996d64730c7315439af79c02fa0df17488281d271f6. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/NLU9B1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4330f71a89b491a411c55fb750d90647d888a4f16cb0124f4d66b0620784abbb. 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/NLU9B1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a86fa3903712dcf653b78ab26316a87c7b5dae3a397e9f49d76504317c2488b. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/NLU9B1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4af09fccb76d9f3dd4f8a2f0e004c6546e583b7047d6f4ed47dd81aef25b8c0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NLU9B1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c28fe61e1790a4032e07b4179d55a68bca793116ce5759854b251128adcebf. 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/NLU9B2100088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b6d6e0dfbb0ee7150ca1a3289f6a3682927f6548f100adc7dd2615414532b7. Chain 2 (Bitcoin): anchored in block 958573 (2026-07-18T15:49:54Z), 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/NLU9B2000078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e690cfbb5da92145dd076b336ffb27b3ddf106439c4442d95295b085bf518c. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/NLU9B2200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123189515120d2e8e1473c7f478fcafd2562b48df2bd7f50b103969e5439f5fe. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NLU9B2200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8c3b28ce0aabcd0512e17e7a73d7fdff99abc116a5a0fc675701a4d293439a. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/NLU9B2300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7406698a2a63fe2a0f6e581ae893fc8d631d4c934fce8b0c67ea2124b49d34c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NLU9B2300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40bf77040e58921f55151cdb6fddf28d37884dcb708f174066add2897bb20bd9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NLSU32400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e0089050afa807ee4f0976a52275b039bc15c23e69eb3597fbb36bb614d21b. 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/NLSU32400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40bf77040e58921f55151cdb6fddf28d37884dcb708f174066add2897bb20bd9. 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/NLSU32400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa434d3b52e8b757b17d3668183777e042c7c4c8425aafb3bccbda18d815b4e85. 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/NLSU32400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2d8c8001629b1dd50133af9da90dd943face21356bf6bb6bbec6579a6ab9fc. 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/NLSU32400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf79b37650d27ea7307efce0cf2472574e9603aa89a3aee0e85095939e0d4fe92. 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/NLSU32400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767f96e9fa73ec2cc0c811c8e54881d9d21f21023688f77516525e74ecacf545. 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/NLSU32400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e77c669514d9562837b6613da04f37076ff9573a14c41df1639b801acc833f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLSU32400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4264617304835fe78cfe98b5610340666a950450e1a01a4a77ce73548ca7ff88. 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/NLSU32400049.
Beste Zangers 2024 (Aflevering 7- Tangerine)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767f96e9fa73ec2cc0c811c8e54881d9d21f21023688f77516525e74ecacf545. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLSU32400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4264617304835fe78cfe98b5610340666a950450e1a01a4a77ce73548ca7ff88. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLSU32400049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e77c669514d9562837b6613da04f37076ff9573a14c41df1639b801acc833f. 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/NLSU32400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa434d3b52e8b757b17d3668183777e042c7c4c8425aafb3bccbda18d815b4e85. 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/NLSU32400024.
Beste Zangers 2024 (Aflevering 8- Duetten)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2d8c8001629b1dd50133af9da90dd943face21356bf6bb6bbec6579a6ab9fc. 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/NLSU32400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf79b37650d27ea7307efce0cf2472574e9603aa89a3aee0e85095939e0d4fe92. 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/NLSU32400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4264617304835fe78cfe98b5610340666a950450e1a01a4a77ce73548ca7ff88. 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/NLSU32400049.
Beste Zangers 2024 (Aflevering 6- Hannah Mae)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf79b37650d27ea7307efce0cf2472574e9603aa89a3aee0e85095939e0d4fe92. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLSU32400033.
Beste Zangers 2024 (Aflevering 1- Karin Bloemen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e0089050afa807ee4f0976a52275b039bc15c23e69eb3597fbb36bb614d21b. 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/NLSU32400004.
Beste Zangers 2024 (Aflevering 5- RIKKI)