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 0x4ece097246ac9743581b4b2a70f56b651ae88950e196484f8f7044bc629a9d5d. 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/ef7cd7fb-b46a-4340-be4f-0cef2a6e5233.json and https://artists.proofprofile.net/proofs/artist/ef7cd7fb-b46a-4340-be4f-0cef2a6e5233.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 0xdcf6e62ddb67a35ed21c8259b7de6c68c9b49ed0f9acf7c4b1880b2e1496a26f. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/NLA340700018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6be000380bdf2ee7905cdffc5cd3edf65633dbe6e652ba32b2a964f997109a. 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/NLA349300358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2cdc57ed09fc9998b15fd6737dd889aa6c1a2b1132c1417186c514fb167ddf. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/NLA340600925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb5946dff65ffc2c979eb7d65f56073de83becfe4d9be5f02392163f8353165. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/NLA349700166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a39d23b91753d34f0181770ea00fca8c4690436393a6a10516b24cae268ab7. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/NLA340800095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe45d829cf11d536f8c44aa872eb19d12fdcd249b9271ad504fa69bc83c59ddc. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:45:42Z), 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/NLA340600923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb49d16b5205bc144a4fc3edd2705a7669edb0985bf9aefaa43e94bf6deaea08. 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/NLA349500200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb643ea5a093b0bf1e389a514d8ac327ea479d68815b97d21a7d4d5450e58cd8. 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/NLA340920801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a40006b932fdd37b1d7f154e658979877ecc1cb040d876f46bac58d55a12f5. 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/NLA340600927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6be000380bdf2ee7905cdffc5cd3edf65633dbe6e652ba32b2a964f997109a. 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/NLA349300358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8c57bdac7321119e305c0ffb012858640f057de33f970f9c4cee6834f64118. 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/NLA340800096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e84727a73a2d5a30ed67dd8cd0b6819103549a3584f820ce308341efacbf1b. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/NLA340800097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22bcdf3390e0a33f75899e21a876489eebbd9b3ee6c6cdc358144e4983cd591. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:03:10Z), 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/NLA340700019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb5946dff65ffc2c979eb7d65f56073de83becfe4d9be5f02392163f8353165. 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/NLA349700166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a39d23b91753d34f0181770ea00fca8c4690436393a6a10516b24cae268ab7. 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/NLA340800095.
De Gouden Jaren van Telstar: Het Radi Ensemble
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2a0477173b555b1bb5a54db73a19e55cdf0c3792fdf9b4eaac7d304b2493a1. 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/NLA349900135.