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 0xd96b3300403447ce2ca7bdea3cc09f00342ca06c90dd86478c293a8f54d259dc. 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/35fe1c9c-b08c-4182-b6bf-173d0580ebc5.json and https://artists.proofprofile.net/proofs/artist/35fe1c9c-b08c-4182-b6bf-173d0580ebc5.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 0x67afd5eb8ff589b6ff82bd4d9ff3b14932393a5cc09985c7a214a2eeb6a1bd1d. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/USDY41941768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc32f978a1082109788b22a3432cfb7e58566cfe9a1f88a76ecb8a5d3d626f5. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USL4R1815675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8adf6619924479a7a816576e16fe2bbe8c1b3f909164d1fc0408ff075ca7df44. 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/US7VG2107056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41cf179a41e24e471860c97dc3d0693c456dd5771f5af9a46ee96f8723d28aa. 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/USCGJ2119463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4645548202add806eda2bed65f3b97654e80347237baba3f0b19fe2d146d2444. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/QZHZ42176940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa55fe4b8d421eadafb6b1d938110584921b1b31cb4a7044bffc28ca3dee4fb2. 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/QZTPX2139756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc0d6c375caaed13d3337f67d8251c6082381b36554b1b3fc58862a31455a22d. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTPX2131596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d699eaea7f534d25d9fa537180bcd38af00227c9da80dbdec88ecccb1dd2b0. 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/QZTPX2131598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f406d7282427c1aebae58c9f1fe0ad7986b5ee1a2e6c121eeaf4976c018943d. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:59:14Z), 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/QZTPX2131599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e34ef57d95cdca22fab1d7f0a6d9bd53c2cc6edad63950d2b54ee537ad75e47. 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/QZTPX2131600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ea5a6ce5c604dfe4b8f5f8a7dd0bea4897d3d9f0b9baa86093da72ed2bc767. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:02:44Z), 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/QZTPX2131601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8590beaa110e81365e55e154e7f38e96f3d310625d61cff56ac1f915df2d0268. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:32:34Z), 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/QZTPX2131603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533166f9318414b9f1a2444e78d5413f72e57228a92e05c1b9427e6474ddf34b. 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/QZTPX2131605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd9579b38f735b1af0a198dbd25a2a9723c150c900fdf374755edd16502a476. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:41:21Z), 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/QZTPX2131606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa55fe4b8d421eadafb6b1d938110584921b1b31cb4a7044bffc28ca3dee4fb2. 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/QZTPX2139756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc0d6c375caaed13d3337f67d8251c6082381b36554b1b3fc58862a31455a22d. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZTPX2131596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a752be8747918e501a620bb7672adc8c1d547f1b51909ca88d240e427ff87a. 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/QZTPX2139757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d699eaea7f534d25d9fa537180bcd38af00227c9da80dbdec88ecccb1dd2b0. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:45:18Z), 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/QZTPX2131598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f406d7282427c1aebae58c9f1fe0ad7986b5ee1a2e6c121eeaf4976c018943d. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZTPX2131599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e34ef57d95cdca22fab1d7f0a6d9bd53c2cc6edad63950d2b54ee537ad75e47. 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/QZTPX2131600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533166f9318414b9f1a2444e78d5413f72e57228a92e05c1b9427e6474ddf34b. 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/QZTPX2131605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd9579b38f735b1af0a198dbd25a2a9723c150c900fdf374755edd16502a476. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTPX2131606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e01a2c7910b88abdbb1bd958bf2fc4433c9845da5ca3bfdc044da38ef6d8e9. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QMFMF2353350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffeb60eb79bbcdffab22fb11c8b9180d7bb0bda6f852d757db0e8b9138f54777. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QM4TW2486016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4796568bcb75f2d9093908980fd39d8b6c40779f8b3598a8e18cccdafe702802. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/BRCMP2400066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8163e682538262b1fe26d98b1260e5e06692aa9055a91a3b6eea3447dd94c091. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QM6N22554864.