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 0x552ab81bbf7e054086a674c767ce41a684456aa59b5a47e511ec017b2b0e73cd. 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/b000885c-66c7-4654-8453-538419271624.json and https://artists.proofprofile.net/proofs/artist/b000885c-66c7-4654-8453-538419271624.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 0x84f317424010aa88cb88da00fefc39a4d3a20083850bac0f188d9f91de8fb582. 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/NLSU32300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd08fa6ca57576f705d8f2cbb3122af29cdb86b9a9869cd4d1db513a8e1bf28. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/NLSU32300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd983d1ff0a45f5e55846fec873175053cb7646958dacf2dfb83e2e99e20ce498. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/NLSU32300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97dc1a983203f7437af7dffa7f71aba65c6a1627a42859ba432c5a701b27f41. 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/NLSU32300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e69469ffc7ea43efaf9d7f4c63d0628e43bb38284658a197d4808e662b46a1. 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/NLSU32300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7c1cf2ffca2af51a7bc7bf9146cdc1a43835942da41be815ddbc17c4f9de2d. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/NLSU32300045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f317424010aa88cb88da00fefc39a4d3a20083850bac0f188d9f91de8fb582. 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/NLSU32300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd08fa6ca57576f705d8f2cbb3122af29cdb86b9a9869cd4d1db513a8e1bf28. 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/NLSU32300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd983d1ff0a45f5e55846fec873175053cb7646958dacf2dfb83e2e99e20ce498. 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/NLSU32300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97dc1a983203f7437af7dffa7f71aba65c6a1627a42859ba432c5a701b27f41. 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/NLSU32300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e69469ffc7ea43efaf9d7f4c63d0628e43bb38284658a197d4808e662b46a1. 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/NLSU32300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7c1cf2ffca2af51a7bc7bf9146cdc1a43835942da41be815ddbc17c4f9de2d. 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/NLSU32300045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec6c8fa048d6a3c55801166fada40e3f52c51ee567f97d1af6fbf115d9c5e16. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLSU32300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f7cce6f07a029126f5bdf2c08eeaa04ba549b5da4906a101961923eff5bea0. 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/NLSU32300049.
Beste Zangers 2023 (Aflevering 8- Duetten)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f7cce6f07a029126f5bdf2c08eeaa04ba549b5da4906a101961923eff5bea0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLSU32300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec6c8fa048d6a3c55801166fada40e3f52c51ee567f97d1af6fbf115d9c5e16. 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/NLSU32300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97dc1a983203f7437af7dffa7f71aba65c6a1627a42859ba432c5a701b27f41. 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/NLSU32300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd983d1ff0a45f5e55846fec873175053cb7646958dacf2dfb83e2e99e20ce498. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/NLSU32300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec6c8fa048d6a3c55801166fada40e3f52c51ee567f97d1af6fbf115d9c5e16. 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/NLSU32300040.
Beste Zangers 2023 (Aflevering 2 - Mell)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd08fa6ca57576f705d8f2cbb3122af29cdb86b9a9869cd4d1db513a8e1bf28. 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/NLSU32300012.
Beste Zangers 2023 (Aflevering 1 - Douwe Bob)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f317424010aa88cb88da00fefc39a4d3a20083850bac0f188d9f91de8fb582. 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/NLSU32300004.
Beste Zangers 2023 (Aflevering 4 - Duncan Laurence)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd983d1ff0a45f5e55846fec873175053cb7646958dacf2dfb83e2e99e20ce498. 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/NLSU32300019.
Beste Zangers 2023 (Aflevering 5 - Numidia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97dc1a983203f7437af7dffa7f71aba65c6a1627a42859ba432c5a701b27f41. 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/NLSU32300026.
Beste Zangers 2023 (Aflevering 7 - The Power Of Music)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7c1cf2ffca2af51a7bc7bf9146cdc1a43835942da41be815ddbc17c4f9de2d. 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/NLSU32300045.