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 0xc21082575c2c32e34bed5118c2bad3995afa0cb5121bc6f9c5a8d91c1c21ee56. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9efa332b-e7b4-4647-bfd2-21ba2f5ae85d.json and https://artists.proofprofile.net/proofs/artist/9efa332b-e7b4-4647-bfd2-21ba2f5ae85d.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 0x5cdd7ee51ef513423a627dc2600f6eb092fcc39d6006d41d6eb5098fb0b12960. 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/FRDX62309290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311d3a59e4dbf3c999307bf5f1194a18509693e95436a115219f00e06ad28b0c. 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/FRDX62303620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f37b321497976d5c1251d49e026d5d2bf5f6c24625c40a33dc624d52ff18228. 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/FRDX62303630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9414fa09f711c28373996c75af5e865ee8b80ab9362ecc5628a812c92df5b243. 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/FRDX62303640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1864e0f674ad0da2b1292de899db924fbaba15309df85087d6ad92d060265548. 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/FRDX62303650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72fc5c5d36360ebd5a9c6d66e7f874f4d1e51558a970f007ca2acb458dfe9c8. 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/NLCK42215932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cdb71babb457b877acf1aebd0b2d2a2c9d170c96ab43ce40ad74e8f0886a652. 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/NLCK42215933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d3a77871d1544f6fd26d704de1364507b89d229098262675d42d02b39bfb83. 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/NLCK42215934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c03f3a802bd91fc2734601fe4fa70c694512e03560501996f9cf91a126c1ae. 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/NLCK42215935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08037ced36f7ca1de531ced0880636f7e79194be541e981435832cdbe7116667. 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/NLCK42215927.
Feel The Rhythm ft. Marsch - Original Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500f9dd1de59066afb59ef974cdcbc668f76bcd8e69e82aec3add99ec036fc73. 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/NLCK42215928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d226ec1c6a99d2bef173c8143a339cfc88464d206e949849b5ed21d8a5bd40. 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/NLCK42215929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ab1bde4acd9d34df97f92c3a69eff8570e89830e8f54b2ee790bc96059f928. 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/NLCK42215930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28816c9b35e8cf39b8b5a8e118c13215255b9edbf334cd9e4b4260d5e395db1e. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/NLCK42215937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc587530138a86e4413325f98fb416f4d844f4da18ea9f06e2976fde0184c63db. 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/NLCK42215938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55931ea63a88a9eae59ae5b81e5fd69d12e6a64e0c4dc65dde159f49d3188dd. 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/NLCK42215939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7f70dbe61c2b7f3cfa8446ea380d02d66397ae7df6086963795adbc6eb5a74. 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/NLCK42215940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e14290229a908acce6cbe1affa903d0b356afe763900c3c467ec7e454cb918. 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/DEH742419337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9eb7a8818c71a32ce218ff9a6c2feb5e58e517ad5e62cc9d62af4d47ac52370. 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/DEH742419341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4500dbbf55ebef3969e8e2a7f778cd2e4717b7a27488a00ac674c6b36a7c84c9. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/DEH742419343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba47da60a0b9a9b9af7a1e8aadfb6fd011852e148ea7ae4f23bfa93707e8dfb9. 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/DEH742419345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500e31f9406a1df0480768898884fc73188e883b7280c71d2b85c5c17e41d933. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/DEH742419346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafdf6200704d11abf85c90c4036831d74818bda7de898aae80ab3a3d345c45d8. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DEH742419347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0947620223d76c98dd4a00950171246ee273dde878354e8f0dd43fe1e44f5a. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/DEH742419349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc18463ee8aa472f64b64cf4bbf07913122c1745c3e06ff292f3c5b4e921900c. 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/DEH742419350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7ba8ee554dbd1e7455465b03d62c2eb029f8b8e38b86b85d5da3c977a037b9. 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/FRDX62309280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdd7ee51ef513423a627dc2600f6eb092fcc39d6006d41d6eb5098fb0b12960. 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/FRDX62309290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f015061df9552dcc829f592448b5947ede11e93c8d06f6ba3842906f7bef04. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FRDX62309300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6d26b296078c4b7e0aef8b03de240523e11787e618b91c53c13e482a6e891c. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/FRDX62309310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6647a07515e32c3fc34827514a878f8b806dc00a55da9f03a05475cdc0ce9063. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/FRDX62309320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4bd1c549745c981a0e380821212ebf9c46dc651c0ce2a8735977196dd3a158. 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/FRDX62309340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53c487dee840b63e0c981b6d3dde51d379e150e73443970b0a330eff2fd42a6. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/FRDX62309350.