thumb|The sound source is travelling at 1.4 times the speed of sound (Mach 1.4). Since the source is moving faster than the sound waves it creates, it leads the advancing wavefront. thumb|right|250px|
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 0x1584cdcef7eafb50f4c0bba3ac9bd756755c99cdf1ad1176170c9f299376ae3e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7d4fd132-73de-4327-91d5-b1fcd6f02d14.json and https://artists.proofprofile.net/proofs/artist/7d4fd132-73de-4327-91d5-b1fcd6f02d14.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 0xf65b075065db23961134c20b013e35ba67de9402df3448fa9a7a7c9305076537. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:23:42Z), 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/QZHNB2332996.
we had to shed our skins when we saw the other sun
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202fa700cff8d6cf9351a8cad12c89a121ad7ba1dac65f9fd382b8b8f3c9b951. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZMEM2389487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5672a96e2d62484c56db252f58379b8e62a3aa4405dc70aa154a35d9b09e9c. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZHN62461065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3713e6e280e8edffaaaff54deccafdd9e87ac51c1d88453a665da90c569fda. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:10:21Z), 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/QZK6L2461158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbecb73b7ba13faf27f327789dee142623216902c462b3dc932208311674e97c5. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZK6L2461159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8a9d5dc094e8e8dc3e9793b81efdb5e5b62be2fe84eafb1ffb4126c7977006. 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/QZMEP2405845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0fcefefd73b55d8bac531b0570623b3598c0e48c214f2ccf66ca4a95ca71724. 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/QZTBA2424500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ee3dbcb9ae6f6789e9b15e745b56d4af5e9e76145b07ebeb7c60b6cfbd471e. 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/QZTBE2476136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0dc2825c5a138e2d1eef7f90f2305e80bfefe5913db8e54b286d28f17980143. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZZ7L2439976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1428a85c3f5fdbaa053a8ffb3f60d625cf78a0dcd02bcbc1ccbe2d7ae72f1617. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZZ7K2425490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5672a96e2d62484c56db252f58379b8e62a3aa4405dc70aa154a35d9b09e9c. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZHN62461065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202fa700cff8d6cf9351a8cad12c89a121ad7ba1dac65f9fd382b8b8f3c9b951. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZMEM2389487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4913953453462a04fc8d20ec12843f9eb63c0a4636768816ed47466ac01b66f. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZTAS2374849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8a9d5dc094e8e8dc3e9793b81efdb5e5b62be2fe84eafb1ffb4126c7977006. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:41:42Z), 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/QZMEP2405845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1428a85c3f5fdbaa053a8ffb3f60d625cf78a0dcd02bcbc1ccbe2d7ae72f1617. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:06:19Z), 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/QZZ7K2425490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2bdd2b24e15096e510ac380406c63d38e187121c750f6735ce6b79b92929d2. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:28:00Z), 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/QZNWT2397254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3713e6e280e8edffaaaff54deccafdd9e87ac51c1d88453a665da90c569fda. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZK6L2461158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a57b33a79e440deb1e933b12378f2ddf330f9c75ba5459ed3c6d6b9337ea43a. 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/QZDA72406779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0dc2825c5a138e2d1eef7f90f2305e80bfefe5913db8e54b286d28f17980143. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZZ7L2439976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbecb73b7ba13faf27f327789dee142623216902c462b3dc932208311674e97c5. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZK6L2461159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0fcefefd73b55d8bac531b0570623b3598c0e48c214f2ccf66ca4a95ca71724. 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/QZTBA2424500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ee3dbcb9ae6f6789e9b15e745b56d4af5e9e76145b07ebeb7c60b6cfbd471e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTBE2476136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06d4da3ae6f1227fab6b1c02240868b16e41296427a916876adf4b0e894e0a3. 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/QZHN72354178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b747f2b00091c19740830693b480ded2ed699a2539d6c0494eef4838369170. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZMEM2384630.