thumb|Dafydd Iwan singing (1993) 200px|thumb|right Dafydd Iwan Jones (born 24 August 1943) is a Welsh singer and nationalist politician who rose to fame writing and performing folk music in the Welsh
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 0x70c021ebf9b1bbd7e977a3f8d00520c3b8701c307ff93ca83a3fd17016ff6a0b. 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/76b9ec72-663d-4c8f-aed4-268c8250fb43.json and https://artists.proofprofile.net/proofs/artist/76b9ec72-663d-4c8f-aed4-268c8250fb43.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 0xfeefc58a420469f531798edce15db8dc509342f82b8133be9843b20d8e3ded86. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:43:56Z), 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/GBCFU9800129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746fec2f5528f4247340095c290615a92288be5275e10a4ecfe9425c18deaa7f. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/GBCFU9800271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2964877ef4d78de0c3e34b579bb6e23cd9cddda42ea56c0e34c1af2fe743dd55. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/GBCFU0600205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ff8a85a81d4c8d4c922917932eb70eaf612d5a9ff3bb9e968e9741d11befa2. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:09:15Z), 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/GBCFU0601397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a93063be3856893a010cd17134edecf332a10e744a8147d15cc73863dcfe960. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:29:54Z), 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/GBCFU0500511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9aa266031093f9476a0a8da6b6ab9766df0f1dc55b895061c6f1f3824561a7f. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/GBCFU0500512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27514337bc0c8555bd64992d99f6e5e1bba7c95a14a27a30226f01173b2125e3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBCFU0200639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2f64b5cbb5aeefcd008d5e8118d87b09b5786b1c77bab12176e2394440d4cf. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/GBCFU0600207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746fec2f5528f4247340095c290615a92288be5275e10a4ecfe9425c18deaa7f. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/GBCFU9800271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915fd7e27f8d83b9e893632c4a62fd4a39d36c35250733061f8b04fcb776b5ea. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/GBCFU9800283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9b51ba00c0d1e9ca9e88e6a812b512fdc8ceb2ea0e6c0b34e9acf305f0c5d6. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/GBCFU9800289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeefc58a420469f531798edce15db8dc509342f82b8133be9843b20d8e3ded86. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:11:51Z), 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/GBCFU9800129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6a1349b9b21a10dc746cc09a4918f8a2b74ed78980534ab44a2a4b496425d6. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/GBCFU0200637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6267538aef2a0ab1150860308e6b6f4bd56f19c9985d2fb951537a9afd50c62b. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T03:12:58Z), 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/GBCFU0100209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaded1b4474f8fe94d1ddf5f4c7b5b7d0e6b0ff18778d8242870c5ca8c2c50113. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:36:11Z), 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/GBCFU0000604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b2cadef9481a692cb9b84fb731603f6317346c9b577a72dcbd0e7465396c71. 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/GBCFU1200228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2f64b5cbb5aeefcd008d5e8118d87b09b5786b1c77bab12176e2394440d4cf. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/GBCFU0600207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbf2a66df4fe232603ad416a04839316d151cbd9eda61032552febcce2a3074. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBCFU1500098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107027fc0fa95c6243209ed7b2d2849d9524db68e27b4c4ebc0fd623a344b117. 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/GBCFU0500015.
Gorau Gwerin / The Best Of Welsh Folk Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f61f9988d0e3f74ba035ad114771e19ba92e0f82cc64ca7f466ce1e422d898e. 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/GBCFU9900035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a44d09d9e94e7e7aad3470e9707c081cd72bcaa07302bfed499a682fb32cfb. 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/GBCFU2400101.