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 0xe3abf044566bd935c306195f217d9f8d95ff8827c185a0fe7d760b0379c1534c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/18fdfc63-9b3a-42b5-9efb-4e10a461e0d1.json and https://artists.proofprofile.net/proofs/artist/18fdfc63-9b3a-42b5-9efb-4e10a461e0d1.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 0x1e776004aff0556d118b4f85b73277c94758026202a7862b638018e6b642019c. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/HUA611400849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60096609ff1a81bfd2dee227ddfb3a503444d367350e5e4dac97726da0d695e6. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:59:19Z), 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/HUA611400851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07e80ea82887d2858c57e0edbdea32694569ba4eff882772590830e6e02390b. 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/HUA611400853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c7f35c793e47ff67ac618026a28ab379b12d2d8a81a51caf4e51c97816dbf0. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/HUA611400854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a08a3faa631507c9dde6273463a619d75966b2e3a997a56bbeb7212d5e91329. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/HUA611400856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5efa47f4b0eeab84864d6bd36f040f805a5a586f9f96dc5be5c972cb443067. 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/HUA611400858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ebd0418bec4646074a3824418d518d37ab33b9e11be5a8a83deb1f4285b65f3. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/HUA611400862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834aea0eccf48015a9fca7482beac9db0b652d4f583fada405e9602fb9fde185. 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/HUA611300627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef054316a018e2f235774a309b6ed2144e7af3cdb5bb182902d707be0eb52771. 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/HUA611300628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e22822d5fc16c6f23e98c749a65c6ce6c1c9a28aec9401202adb38be2e57852. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/HUA611300629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d15e0a3449676b18219d7bf5b63da3fc95a29817eca36bc1bf9badeef93bcd. Chain 2 (Bitcoin): anchored in block 957624 (2026-07-11T23:13:54Z), 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/HUA611300630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77fb7c630273a8f754df0aca9a14a54e890eaca8f92c1b4b7651213507886593. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:28:25Z), 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/HUA611300632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13f854b3b95f05cd7edff3dec0bc596a1848aa2ada0ce001502a1840e9114e1. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:25:54Z), 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/HUA611300634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee09324ac7005220ac6680116530b8fc092167fe62f0b5ceaac30ab9ef14ae9. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:57:27Z), 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/HUA611300636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b7b2ab6b4d522fccb9b63a247ce04a6b814a9e3d243bcc179b45cf77f9950e. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/HUA611300637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf674745c0c754c472edd294d2c25fb8426a61e53f97a0684ac7a0d5036dd8e. 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/HUA611300641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9937c4803735c57b6eecb187adec677fcd5878ddc166e062b39686b26925cd9. 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/TCACG1580540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd362e01536e408631f34dc2f300ae560b8c643dc2746bee6285beb4ca9b43d59. 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/TCACI1511707.