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 0xca3e4a5f16d2fa9cd5ec11b97b7568777c7b26c9775b2545acb7676e071c1004. Chain 2 (Bitcoin): anchored in block 953614 (2026-06-14T08:40:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/18598a2d-aba1-46c3-974b-94c59a3367f8.json and https://artists.proofprofile.net/proofs/artist/18598a2d-aba1-46c3-974b-94c59a3367f8.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 0x94f83aeb5532454e0685f0d4db826a786c4405a5b2a3f138ccebf00d403cc06a. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:41:49Z), 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/QZHN81943796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0881b31f0684bee76f515191b5d4a566df546a3fd6c67ae466375089acb81e. 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/QZHN81943797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6faf1ee1e9765d4768f0538e9d008ab412acf42fbd76bfc4da5920fbe8a4e44. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/QZES82037104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5f051ae87b85c4853335c7a4487b6f8f1e15ff9f734e824d008de734faf368. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZES82037105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8578a0e5bcb4012fa8b16084d6256d934775dfefb35ef8a048ebaed3af1599a4. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:17:54Z), 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/QZES82037106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04916e03ab968a2343d17920e2b2fbb2eb289f860f5ca776bc55dea87ee0250. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZES82037107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020546ab18cdcfb1fa2af80f7ae28413fc33e8021f5b3ab6184f86ee43daa7ee. 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/QZES82037112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0963390c2a9969a60cecc8f72c7cee793313f90f5f6a5474aaf9202176a8802. 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/USYB32236801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540defec3a5becde81212695dad1f4ff6f577be1a542f4438e75861562f76fa7. 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/USYB32236802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb424bc906ee06d6acab1fa44d48f5ba8c7383ab49acca0f9465d14b2c9849e94. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USYB32236803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8b3d85d04e3c5d21981cd957626dcce3cf88009ad30c8a88129a5d8f2b44be. 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/USYB32236804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17817a56e879706b786f77c146ba3b6840fc01417c5a944de5a29f9d5467b32a. 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/USYB32236806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d5b539f2672e16c51eee7bac92d35c977d17e1099845d72054d626337848cc. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USYB32236808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f136b0cbeb11adf9e44c2d2772368cce921f8caa3780af637b3c1d1399dcab3. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USYB32236809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0932f916689934b7206fc54ecf25c34b9004df70bd58423e2ed6876c7eb1ed81. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/USYB32236810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17672b2a294d28b674f1964d658b94c4c1f67452ebd72e915f6b894696dafe50. 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/USYB32236811.