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 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 0x13387d15a267afe6c1b431086e843b1721faf6f5092bbb77cdf5c56de6342fff. 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/c827e123-761b-4b9f-b503-d8db496ac83e.json and https://artists.proofprofile.net/proofs/artist/c827e123-761b-4b9f-b503-d8db496ac83e.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 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 0xc16ba62e1de51c7b624dc56d835e412b5613fcb1e2868a860f3e28210f525411. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USHM91674862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5221e5127beb213d33f64f54a7ba0420c4659ec55e416014d59405aaed4044fb. 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/USHM91674869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351a2cd62e88c7a2e181cca2dd00bdfce0e4d04bfd229e88ea14c36549364245. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/USCGH1766384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ed5e8573a8e34df11f2a61dca087d61fd9888fcab26943f8da1966cb57b800. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USCGH1766386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13729d78d94831f9b0ca2d357a85f2ca59fe17fdf10518ba4c9fe24870cfed3. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/USCGH1766388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9adb9dbdd480e5caee707ecde8ff35706850c4d8b5e8adefed0a33cb6d2bc494. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/USCGH1766389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd079460c62b1ec65207a927fdadd7da53d77a6dbc1f6c09f5d887a3fd9ea1e5. Chain 2 (Bitcoin): anchored in block 957661 (2026-07-12T05:37:10Z), 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/USCGH1766390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93bcdb4a4a102293d0b5bda21ecff5e95f7af7bb43e5ea6c76f225ecbc629379. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/USCGH1766391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904ef382bce36ee32de05d398e017153934fa2075273c5e01a407cde6192250f. 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/USCGH1766394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6246a671dd5e5bfc5a1857772b0cafeae66f4220048535d1b6c6f3015c0eaf70. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/USCGH1766396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6ea82f4f0815fbcafae7bb72ae2c063374a29be8b85752311fb2a0730dccd7. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/USCGH1766400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfceee885b76ef603c54b1403a0df3c7eee0818ab291349cead63040793286487. 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/USCGH1766404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d16d622f77bceaf601256ac985356ee80e7ed4032d60245ef33a9d68ddd32d. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USCGH1766407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef0c717b24e4eac8794ad18ec55729ea5bfbcf7cac13db8160e8e0294b334dc. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USCGH1766409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459d6c9ee7835c5da3fa5b18302997a9dcef384e467d00dc9bda6fdc6f5b4897. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/USCGH1766411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8fc9db0513486c7703c76abbdaf0b36733cab622e6d92a0bd8e55c4c80da0b1. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/USCGH1766412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a8a85463d4bf7a01f6375fa954d07d2dee2e7fc0811811a2a085b04a3be020. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/USCGH1766413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18949c6020a8ece750355c321f19b6cc1c139e15032fbaf145f20f4554ed1949. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USCGH1766448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dfec47ef8fcfd03d06df469eecd64325503973c1bc095fd9fb7b7c1ce7942b6. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/USCGH1766450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72307e040801ed399d58d68b7f10863d670d022d2ce8a478f9ee4013c0f8a9f4. 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/USCGH1766455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23efb0dbf3600b3d1297dfa15feef0dd65151a64a047d4f432414f62730a3d56. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/USCGH1766438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ef4227d55613248041c5e437b251157df7324508a9966269667096adb5965e. 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/USCGH1766440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c07ec04094376c7ef175166dfbf90f0529002ab193272c5bf0e57ec45be477. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/USCGH1766443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3338ba7d4c32c51beb4df672673f0d72ac320080417722898bb54c06cb326514. 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/USCGH1766444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdacd2c23b1d4675a49c818cb4c5d66c0f7d7c272b7d4eda1d51b1735be7d3c95. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/USCGH1766415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef0e9e97f7506d2db98ce48b5bb9f8e5e12109da3bc5fb5a91fe32801eaebf1. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/USCGH1766417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ef0137f50eff9c8b6a148168145607f5084c71c80712c2aad95a96c0a99ab5. 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/USCGH1766418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b3ccdff3f86f46c892bb9c4c65d70d1997d7cda39ae5c6b4309a9aef1bb4a4. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/USCGH1766419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33205b723faa54755c849fdd091f099eacef7f9cb4087810dc0d785bf41e1205. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USCGH1766421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff68df7d3003498eea1cfcb703c691168e9b4535e78b023546b3440d74b9284. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/USCGH1766423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c89330a4b82750fd53d376b9ecba907307cd61986b5832ad095b3c49fe42fef. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/USCGH1766424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74ef0ea68825c3f5a8e2b447d3b58ece55e359aa6362d15e90fe51663ce3f5e. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/USCGH1766426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570ac13e9f57182ebea21461b62e90d514d5d29dd30926175ce609728be864d0. 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/USCGH1766431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6bceb0c488e391bb1a13f800c832c110bf0ad78a438a592211d131d675d1ed. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/USCGH1766432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d3c41be7125bfac0c8a4be96172e57b9c68b3e8eddc919693094b3442fdc9f. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USCGH1766435.