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 0x23b0de238108a1d82f5c4d8b848d4a361c5b4d2c187f7b5ee90ceed7cfe7a45b. 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/85d7fc65-8717-4d90-a5e7-e1f369f49900.json and https://artists.proofprofile.net/proofs/artist/85d7fc65-8717-4d90-a5e7-e1f369f49900.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 0x35f1b9b973a97dc8f05a0fdaa8124dac36d17a1c2d0a4cb9efb6e4484ff8d2c8. 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/NLZ542301264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2833e28582c550bae7ddb6fd517411bc2824a700671eac1d755a42247ba596. 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/NLZ542202090.
When The Sun Is Gone (feat. RYVM) - Extended Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62e9b4856ab8786c1e68fe1ea18e9da2a3484874411816c05d2c0aee2539fd5. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/NLZ542202091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8917b8efeb571d5e51677083c41e55a9a81f0d052dfcf00015bc882daf8e1486. 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/NLZ542201962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af065fa8bf06833f239e2573bfb0a80d10b0447f1d5e9947e8f5226df19ebbc. 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/NLZ542201976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73fcfdecae0f0ce86a57d647ac8848048a308e02b833912475f44b34555242a2. 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/NLZ542202020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2833e28582c550bae7ddb6fd517411bc2824a700671eac1d755a42247ba596. 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/NLZ542202090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ce07d870b786d646a90764a838c1e6d3bb8bccbf7872e8e5880f7d3c38129e. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/NLZ542201963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b008464061ef2e87d87fcd857cd3d54cd28ccd814b91269ff95f2137016b768. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/NLZ542201977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e850f28e2e566ada0e30c9220c074b9100f01e42af6ee1c0664c0231325740. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/NLZ542202021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62e9b4856ab8786c1e68fe1ea18e9da2a3484874411816c05d2c0aee2539fd5. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/NLZ542202091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a59be3fa8289904edf5828d3b4951d68e24be3fb6a5e82327112c2288a7cec8. 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/NLZ542201214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfb01bf0cfba1efbe431a2c9302533f2f167bad1f4f266c28679415a939360e. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/NLZ542201215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eae811abbde78194db2f51d3a0cda898d59c6161f20231403037cfbfa9747d4. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/NLZ542301265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad35e18ef5d86906c2bf9a9efb8dad9ef27d559c5989d6813ddc97de5b03fec0. 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/NL9KQ2390370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9264066f4a9eeead3337acfccef63a279da6c421a91e1222ddd97b2e55801a65. 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/NL9KQ2390318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae66e1d6a15cd896c4e7812b425a7e5196ce47d1e9086523ed333cb7e4310b4. 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/GBENL2303703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac83e0d96ea12e7ce2508b751b626032878cac218071ba42259abbb7618a46c. 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/NLT2H2100770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d4719fab29eadedf668577249c525e4ffbc249f597d1ef49b502882993f85d. 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/GB2LD2110121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3172c66238dc9746b4cc650d1780e00e1ca04b5e74f6a730fcedc01932eb167. 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/NL9KQ2390504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5ae76b9259df370017916e56a1c5a642892f242e17d3127fa4b76fb794063d. 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/NLML62400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5922353d33e6a2a9936956e12817e5b78439b21789817bad0e09d341332acc43. 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/DES232400070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0a4ba57b2461b23593127f5a46adb61e84586ddb5562127f862eaaac3708e0. 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/DES232400071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11bb12f1ef3d0107a45de5eda4ed009eb5bf1b2e2b2ac0b62ce2c276f346e99. 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/GX38U2206812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901f196988131678140fe781069cdcb48ccd9fe2f654298780f234539353a94a. 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/NLT2H2100730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a28878e22d711dc5a164133815af2ab17277baf4adf8feacff64f33f675101e. 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/NLT2H2100711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d196a7ae5b18146b77bb57059563aed81c029b4daade12f4bdb1f6a26bbb804. 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/QMFME2135064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44fffa31d5794c4ff02cca8a1ce949019aaa282157a06323a53e1d5742913636. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/CA5KR2177263.