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 0xc6296068e99614fe2b4a64b0334e20de3c3b8bf025b92ef049fff9a378d53cc7. 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/6af5c1c4-a9b2-4033-b8fa-f3336af40495.json and https://artists.proofprofile.net/proofs/artist/6af5c1c4-a9b2-4033-b8fa-f3336af40495.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 0x68f7b49cb2e73a0888f5470fd5c9627adb2ef1765b53f962125d9fc4c0fb2ddb. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CAQ8S1616739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285b0b22ad6a0dde7ea016006f54cc7aaeea6a05119d789c311871756f836d49. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/CAQ8S1611597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e99a290b03091d365621d053207d15c86747dcf6e99ab03c4144713dec83a5a. 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/CAQ8S1623128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66eeedfe6e4c762b4060f474025d9cd3f5b7d6a0559bf891285fb7c62c99b195. 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/CAQ8S1617020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9a5a2ccbdb191788c30244ccd3c3c9274d7b7728c261c05a8861b704d790e0. 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/CAQ8S1618564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d7f6d9cc86fbccf9e1962aa1f671c9b695f942491f54fdb158be583f88bec7. 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/CAQ8S1618885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bba4e2fcb5eac2d8418a469fb25f565865e767f1e77d46d8f0c972135c460bc. 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/CAQ8S1618953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca34076d3cc67a37c080c548cb03a65e8bbc359c268a96eec75e5cfd31405a7. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:33:56Z), 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/CAQ8S1619396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f87db17c4613edbbf34088dc59e3dc8692f10b00ee51aec1c3d39b4c0798991. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/CAQ8S1625706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3caf2aa4004f67bf90d326537bb70f0ad900415c07fb3c51dff176d4b20318cb. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CAQ8S1621283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45df4663f282eb296655d0eee738a97f1b972aaed452002863c9fd1dd9678a76. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:50:37Z), 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/CAQ8S1621787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27477aa51f2ce354e15b347705d3f2f3b3219eab9a638dd10da7672abcc8cf8f. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:54:36Z), 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/CAQ8S1622664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf37b295a78767d190d4e523829bcad9425c383e837cd610624f50ee094c6d9. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/CAQ8S1623643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e8e2c933a74ad145d6ae5d1993eb616b95f2c63c3391f55ac0c990d30983dc. 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/CAQ8S1624256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeccd23df44cde8adf60178126c21c7147f1bfbc64352395f943a4f24b6a7ca6. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/CAQ8S1624257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0178ac3c0dd7d67e8c800b9c31ec9e9b91d0c1c5a511cfe8c8c6842851565c8b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CAQ8S1624250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf56580be21c8ab8ac8b712fc9664f7f5da5ba3064d8738004899f56beeb295. 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/CAQ8S1624263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d565d6a65144f7a752225c2e0ecac7723e3d05e8ebd6f00bdff2cad02d0dd68. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/CAQ8S1624831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded291d881514914fc00240f010baca773e562ee7ca38e21f769903c21e2755f. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/CAQ8S1642068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0cbed24a937ffd390f4f95a966f2e70eaf13b79c4f28bf2fab50665762491bb. 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/CAQ8S1644759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b17be29c704fa2cc4338f00000c758d15dd6323e9f2fff9ac872ad54a152154. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:18:48Z), 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/CAQ8S1646511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4439c8b9f1e2f8bfe69b64000c03c9a206aec4fe8d6de1a824d5f8d9553d05. 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/CAQ8S1646530.