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 0xfc5bddf8c924df7481476c0400c341bbed7bcf048e19f5d752a2363362b1a652. 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/becdb4c1-334f-497c-b9e3-6eb7b3dc3842.json and https://artists.proofprofile.net/proofs/artist/becdb4c1-334f-497c-b9e3-6eb7b3dc3842.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 0xeb1851b928c71047544bc901c2c819552cfdfccccbe771c064e39e59384c722a. 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/BEB680800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7564abd611b6e208ce022fb153339804942db9985962cab104eb79524c0a4e. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/NLE801717008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b7285d9486c6f5953761ff7bbd256e883aa03b8a38b234ebdd1a5d7167996a. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:32:26Z), 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/NLQS91700091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73af84a1bfd98e973886f60092d26ce00e202645059c6cd3eb015e226f53ec69. 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/NLE801717009.
Eeuwige Jeugd - A Foolish Anthem For Freefestival 2017
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf393d1e1784ab3f34b17ff63b1c3c9fcbd6c1a8dbd835985d671c6b6703ec27d. 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/NLQS91700101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a0cced61e6d37a7b664236da33062ec3ca7582842cab2c7f21de4230187d0a. 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/NLS241602011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28e7ff4c75f975f14fb2868a77f84a7190335a40d1277ab2d00849d18bd015f. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/NLH2L1700094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b792b063223a8e4d56d4e6bf180775f2ea649658580b2d5ccaf13bbe6685e7. 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/NLS761700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81babb35fbc44b6ebb27d65de8f595271f7b23ff7dbc89a6456f62c5cd6cfe89. 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/NLBP51600240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a19a3ef74ab8c275de6c6b8576696eac33bb65782cf8d853be5fc68ed0eba28. 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/BEB681600260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b36ba573e60361c0963ae42b3aa5fc19b0131d5e164cf02c98eb0da4e5a257. 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/BEB681700126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8efd33f4ccc9cda8601c383362413a444ad665da793d17937d8dda175a3f8ef. 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/NLH2L1700060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7f39b23a3aa614b6ba6d511ca85c0b097f1158edc0cd207e41f7211dc71170. 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/NLBP51600229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ca51b4f22473e0b7e9d01dcc60c555019e8b608dbbcdc15a2e9d50d9147c56. 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/NLBP51600201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3146ea8acfd39cd3ca76d8e40ee22d7a4bd7a601a687dd396c38445d33539a11. 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/NLE801717007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffb6d3b97f486005da1b2a6f2d445202596f53e7881be3a067951ebfe115524. 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/NLC201700063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc1c6b8e5b9806a464bc784bcc177f27b244245a7c8fc894b1733a08a955348. 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/USZ4V1700031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b70ade53024dad6eb5688f6377a4b2bfb5af4cab0d44ffb0cf3bf234d2ccf2. 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/NLBP51600223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233631425e71cd7b91cbbff9274a8da83d7966d12b1dfd25f2c9170b3b47bd8a. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/BEB681700040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a4a92c211e97267b2668d40a8ca3d60cca8830496fcdbc181ce4fe187d1fa6. 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/NLE801700098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74912a7e896e82c24563fd7aa00d71255cdd51313b1b637de94765f8871bedf8. 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/NLQS91700097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfab771531a9b5c591a743007411f6ae12566fded3bcfd818c7ef61278f64831. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/NLFL71700057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cac3f325c4e4fdaf72228307cec68351281913d4c94612a98f5851664569a0b. 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/DEN062300300.
Rainbow In The Sky - K & A's Radio Blast
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77a9dd8fca2066eba95d5e70cc1b1fa3c5b267515876d2e7fa9e46125b89462. 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/NLS241700071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c12fa2c2bfb766dd8d573d4c1df29ff08e2bdd543f55aa3e5c96f6f2fb38b2. 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/NLS242000345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86368345bca23a1cacc25ba3fd04916c3c726d4371002d980c88de27c84ae395. 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/NLS161801703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4453db4476308c3a7a91d7dbdd367c2ae51a641643bfde41911d85660bdcf9. 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/GBKQU2441397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea4870bc041a954b86fe740bc56f4ce9f9a7c2c14b52b465e0996165cf51152. 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/NLS241103140.
Engeltje (Skoften Sloopservice Intro Edit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ba4ca74e75ad904e95fd275fc8333eb4cf42e903e54d8617e93efe0bf0341f. 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/NLR1T1800065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3e931839dfc80782be3dc71c3ba023ed408c311e61c3b15e55feb75c23884d. 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/NLQS91500117.