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 0x7f18b1acac4dd7e9f154e9a14ea634305d32847dc50568cdbbc6cb93c4ed5d32. Chain 2 (Bitcoin): anchored in block 953783 (2026-06-15T12:24:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4a9163b-8f67-4e95-8fa2-5be92217639d.json and https://artists.proofprofile.net/proofs/artist/d4a9163b-8f67-4e95-8fa2-5be92217639d.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 0xa7f3e11946fde25c6a3699fd558b8ba7340b8c69a9eb95bf3d6499e6f55d3f88. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QT3FF2503122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e1ce72dcb140d7518e18e3e0f5932f41fe5eef5ba339b81b8b0583b645f8a3. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QT3FA2536250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a179bdd0be7ee20f3bfd3d5f743a0777f7e03aa8bf7c45c74d0e3cd7af1153. 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/QZZ7U2573373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15fd99909afc44499ff505b8705b4fd7d1ce2cc01fe5d6c0362d003d3eabfe41. 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/QZZ7U2573374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf178fc6e16b85088ced65409afb94ae2f49483a8d29ce8b3b622072f45ff6b3a. 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/QZZ7U2590591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e40181515bab74f20705288857fed6d8f581a2e07bcc2bfe1907b140d6d320c. 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/QZZ7U2590592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66bd31c34cf5e2705f72b76990552169d2443bf7bc96085b26cefd5f2c2d73ee. 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/QZZ7V2535880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d61e58f9954da2e968b0cf73059717aba03283533b148717c3aadc43f00b0c3. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:31:58Z), 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/QZZ7V2535881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463e734efec8ad2be7db5ef3759105c8e82dab6df6fc78e0e5cbbd320d4484f2. 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/QZZ7V2535883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd240825b6a6747bd5558ec9baee0d1b224ea1e36e1252b0345bd4699a98817b. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZZ7V2535884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fd5ea5458f4620b54913fcaddf257febbe5547ced2d47e0e9346eab1bbb372. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ7V2572167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95fa4fd935680a842d05751127533ec46715cb48c061e3328e0d0b1ed2ba0e36. 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/QZZ7V2572168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8041062e8c45e5a6a028fd244ff42e989a25be91ced7340d2b956e015f07a71e. 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/QZZ7V2535887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2938ba93fc01912f386e166518df0c12bae9da3c323da58ef62fd2ca5161432. 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/QZZ7V2535888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd341d461f6edb68074e3fbe20c7ef89d352eb99a29aaa8c463dce83d8d88c037. 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/QT3F72569751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e208970842ffe5ac5995265c331aa8042fe3dd11dbe05fb5b22bee375b782fe. 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/QT3F72569752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088849385f598bef6e111f8d576cc2cf27565fdc25d70cc764dcface48fcf60f. 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/QT3F72572318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba44d7161238f57c245a3390f681e099762d75a6aea937e24e20df64e1a83a5. 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/QT3F72572319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65f2c12f4942201ebc20beb28c73d6469bf149639f52c5e6d071b3b31b362cf. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QT3F92582675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c2d41f6ba06285c61c3a61208b77aa75a04a42dbdbfe5c8fc2d93af3980959. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T08:34:22Z), 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/QT3FF2574410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc394688b11c11836b2e8f1fc1ac14db2b2216ffb693044844674aacceac6134. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-22T01:28:56Z), 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/QT3FD2521978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7302f80bece61d9f917c1bf0ddd60908b8b0939522a62273cd16d91c255baa2. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:29:27Z), 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/QT3FE2539977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c6427334a4471cbcc7b9fafa2908118d06eae69d973067a2322c0cb6dce54e. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QT3FG2528450.