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 0x1be6c81a6d434d5742639751f3fb0925df1fa8be5c5e535a156b4b74871b4ff0. 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/8c004019-207b-4347-b400-c62f3de9d5f3.json and https://artists.proofprofile.net/proofs/artist/8c004019-207b-4347-b400-c62f3de9d5f3.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 0xa7f25be85748d4386afbe64da55197eab1d160fba058b73735dff9b351ef0252. 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/NLV4U1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911c89d5032230f740137afef822fc4ef44377007b8acaaf99b750b024706bb7. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:39:10Z), 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/NLV4U1900001.
Great Big World (feat. Birgit Schuurman)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8de2fc385d93568e58be7545884a944229973631ee7332decf9fa4a2fcf9f8b. 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/NLV4U2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacaba7ba3d93c9ec5c5bbef848644fa86449a8d8a79ddd604d544e1e18a5d193. 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/NLV4U2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32aa3548baf0d34ed50a8b8bfd92bf1a6274ad819f2e0d691fb33dedf2dd7983. 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/NLV4U2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b028170c38217605a16a916aef297e3de419bc3db8a81271876749a551a0c9. 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/NLV4U2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe506fc657f85ef9c6a978993885489d7ef388aafc800a32f21888baa79acaddc. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/NLV4U2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb403ad1ff634ab58d0e54af17e76222bd5fb037ef12b549369543623f3716c98. 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/NLV4U2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab653d4c8a19568bec96353d824ea245af1e74079cfc7beec3445664dd6e4d3a. 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/NLV4U2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa79bcba1c658009062013952490a6c2dcc686d9cb47cf6cd56d119b8ee3dbb3. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/NLV4U2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65824c4132c0f72a8829489fd44ad98d5114763fb05ad6f4a9f66322c1e23512. 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/NLV4U2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0dbb30fc050af51fbd74874a9f0a32cfa230b830aa722d1ab8373fd42884cd. 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/NLV4U1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1fa1e73176aad7188dc1db1a693df0ef0b5a1f5b7b031c30050f1222f7e888. 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/NLPM11827322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97452fa008b2f9789eb9d2dd19465c4c803250049fc3f1703ad13dd6a440d943. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLV4U1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73901fe9e5042909c1ae2d517476aa987459cff8de15c7d18e4860dab33ff152. 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/NLV4U1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f25be85748d4386afbe64da55197eab1d160fba058b73735dff9b351ef0252. 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/NLV4U1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8fad1baa284c5471e0bcf630352c4ef445957a778de39b56aa0b2c88217c536. 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/NLV4U1800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248f109e14b3fc6c00f8e185f1082ff44471d480843d5c311c2dd95620f24020. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/NLV4U1800005.
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 0x156abcc78dd92bf5641552cd0e99d5aba1ab037b89ff30eb21e8da18b2fa334d. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/NLV4U1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6b7c328e8fb016c15139dcb9943cee92cc6a1fedd552f2fc435beca5dba99f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NLV4U1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c24879192194960e5cd3444b8c8ecf5902cf7a7a54fc293feba1c887645ad38. 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/NLV4U1800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fd85e2901e748bb45bf8c522f76a4463f1ee7d123d94903c4ebc65b4680d34. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/NLV4U1800009.