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 0x3e83816d4306692287ec202343254e53cc230bb6ea2c5ee9ac17d7dd3638d34e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1920aa12-f9a5-420d-b11c-8bb6b140354e.json and https://artists.proofprofile.net/proofs/artist/1920aa12-f9a5-420d-b11c-8bb6b140354e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
De Regenboog Serie: De Alpenzusjes, Vol. 1
De Regenboog Serie: De Alpenzusjes, Vol. 2
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 0x4b4152b12424563f806f8561d586ef8e79d0bb598c3a5f66f64fdc72a95a834c. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/NLE871217004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4424f2e2793d371ebb8f4c32af80f1a8cf5906f190cfcdc87983383e7836c04. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NLE871217002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e0ccbb1b20f0215141df561f5bd404221018bd9d2fc2c13825a02084120047. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/NLE871266301.
Alpenzusjes Hitmix (Mixed By Party DJ Rudie Jansen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a4609973ba86c557578c7cd969c0f4bb4546be7a377aff8b14b75a7e35c23c. 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/NLE871911800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15e8cc1d5e3ec30d715d34541f3ef614dfe4f3bac83254798110217be26e4f8. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/NLE871917700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef6157ac41fec247cec8bf3cd37205d36462c057510afe10c75b6b1801fd6ab. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NLE871924500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f5cc8b94974256b4ef1ba2b3eeadeea5af2a14c1d8a121f2d8ecbeedf5dc34. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:25:26Z), 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/NLE871921500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e4b21da8fd5be9d2ffe6629e0737a6ace734744c6e47826c139054ae67ab89. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:29:52Z), 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/NLE871926300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566f80f59d0dc8304c5ba1b71ee8dc568b08575f0f676383bfe0280bd049949a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/NLE871736601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde613e6448b66d4b3f1e9b304acab97b843cd3e68ed784e0972d148b8cdd741. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/NLE871911200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786d1deaaf7e6c7e842def2ce08df9e60fc6a7479181c4d7706d6e688f96639e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/NLE871717401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8d240756e52dc1a650b3b257fe192310636661e258bb79d5b82db151725eed. 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/NLE871939900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03bf322550f0627ab6bd02465a58dd1152cbcac6c9e4644c8bfed1c8d6556251. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/NLE872220001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b94220b2d99d206c590f56f9db2b34a528d148472de51251293878241cd9950. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NLE872301201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83447e9b77dc5d66c472d62405e262bbab9b19260975f6ce48c88df0b3b5933. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:57:26Z), 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/NLE872219001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10cbebd3af6f2f4a289ed914bbe4ce1479e74764adf1ba505c005d640e51137. 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/NLE872309101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e85678a3fe7b021c2ccbda891b19159d47d7af502f52071461979181682d2d. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/NLE872423401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaea4920eaccc45c1e144bf0f25a65be413f1345a5170d85668908040bd86ec1. 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/NLE871926500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085b61d0ab2004e8955d5474ec187314d91d2b6a7349f89539ebda53acb6d111. 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/NLE871440801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5ca3dc02d0cee79d46de280525fee72600cfb96220a271c7837e04cba5dffb. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/NLE872200701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5ca3dc02d0cee79d46de280525fee72600cfb96220a271c7837e04cba5dffb. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NLE872200701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473b526cd1caa110cc64b85a31450e9dcb828295bc03226374de2bc34e01a153. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/NLE872310103.