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 0xde4c79c3555e00d5d6fbe4c6bfaae2bba03ee6c2eba4eafbea8a0977135bf182. 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/eb1f1aa9-88f6-40a9-b278-efc9be036a76.json and https://artists.proofprofile.net/proofs/artist/eb1f1aa9-88f6-40a9-b278-efc9be036a76.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 0xe474f5ecb80c998c6b6122fac6ed6e5e7ad9471c179c19d404a4e19d76ebb37f. 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/QZHNA1988765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294d1fedc7904a36bb2a61d33da3cca76aaab086f65bd5b1028de8d80b540a6a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NL3GQ2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0ce9372ab01ec1d77dc77ace452175e966c20b33303d14501c4796733fa391. 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/NL3GQ2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8a2f9a667e5e6db404259509e1f1c7b65080ce6f27ca65e5d8d813da2fd74e. 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/NL3GQ2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfae2eba42ea1a87996bd6cd2d76e218f1b73f55d83c15c7f284cd1b04b13541. 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/NL3GQ2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa670fe885af210781c294bc1ab0cc115c88fd34a5127b9a634a0970a4eb340de. 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/NL3GQ2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x151206fe7fec03d7344875b421705e7e3498b4e7b2b5be66b673e0a78324cd12. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NL3GQ2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b36bdbb5dbe4fd58b3f805be623a2a95563c2ed291107dcb65f082a0667999. 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/QZFZ22063850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23395d30f5d6c211a9a89bedc7efe46dfb915f24644263c8dfe220f4069bfe30. 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/NL3GQ2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8a4c351ca08a5f0a6693ef7f4a3f55933753c215a390dfccd4da397625f975. 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/NL3GQ2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2376bb855d9dc8aca9da2cac04ca43b1c10b10430a533ab6eec85d1167efd5f5. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/NL3GQ2000007.
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 0x779d295ab45d803aaea172ea164475ab305a71c75803443b6f712fe4dea25082. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/NL3GQ2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405a7d52a1eb12511e4f4050c2225a8433c07fe8140200b44210623411b93c44. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/NL3GQ2000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72899727d7cf42ed0f30a53ca1ad6b4fba80fc755f06e0d1b38f52e65fba04fe. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NL3GQ2000028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29894918764c4c7ee3dafc586b33f48c368eecc1366059f7b617d4e5021a9c15. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:01:14Z), 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/NL3GQ2000048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9392cdb2391c622bc94be823ad376cb0140de1cb564fe5ff05afc14b58de0889. 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/NL3GQ2000104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31945475f1c84800c28854c21cd35108d13f25b1b0197e429d838b7e1e81bb11. 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/NL3GQ2100148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed21cc9e24cea95d5c50ccf9ceb16126ac4333aa702caa66f2ef55513c88df30. 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/NLG661701015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fbdd29aa2f8a47de605009a0a0e528abd4c668ac70608eec3301fe452a59738. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NLK2U2000380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ed7e3413474757034a97656a7b5838871e1569d77f3ba9e11b1d0a707b8911. 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/NLK2U2100475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45262d7528f550e1374317e51f4f21a6c5a4b6a9be5ad20ab6582c3f128be1df. 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/BEB472000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d951d21dfbd517ecaaaae047894087d78473a38f411247288eb560e1de9c832. 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/NLS241700174.
Rewind (feat. Défano Holwijn, Jhorrmountain, Kevcody & Dopebwoy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077dd7c1fac1ab2a0f4f72c8df7f2486b529c299b6af8f1a557ffc19c0a8c20a. 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/NLN8H1600010.
What It Do (feat. Shanee, Michael Bryan, Défano Holwijn, Jhorrmountain & Lange Frans)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b464b0a4f6b1d04afbfe1f14f0dde39a4a1905753f5817565a5eb3fbbf3176. 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/NLN8H1600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021b1bd2c5ace9c1c8a35777d1eee6058e069ec13e423d2df8f3d6039fdcf2e7. 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/NL3GQ2100341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e51f3cd02ff50d5ffb16b4bbba482c21b1903b0a041860f729ca6e48dfd263d. 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/NL6JV2200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077dd7c1fac1ab2a0f4f72c8df7f2486b529c299b6af8f1a557ffc19c0a8c20a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLN8H1600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed21cc9e24cea95d5c50ccf9ceb16126ac4333aa702caa66f2ef55513c88df30. 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/NLG661701015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53ceaa751dad4a584630665e4d5a46181c6ea5a48dd30732e365d5d330527f3. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/NLG661700895.
Nu Is Je BF Niks (feat. Défano Holwijn, Lina Ice, Sevirio & Gino Stacksz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432633cef4b91290318bcb0e7a89ced76f90144fc00214a2313776bdd3f927f5. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/NLW6D1800001.
Spraakmakers - Urban & Hiphop Hits In The Mix (Mixed By DJ Irwan)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6a4e9554f3ca3a4230de9785690a9974631fddb781395611d023c540d0734f. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/NLS241700265.
El Plugo (feat. Défano Holwijn, Jhorrmountain & Lange Frans)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaee86e916cd9a9ca6a3afab9461ff8c4eb8c7cd0b3de5dba79e18f1746cdb76. 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/NLN8H1600008.