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 0x48996edecc20a6f97d5611151713c5ad49f318517b4cfb75535c383b309bdb21. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/68543f8d-1e16-4458-8aea-698bc4ac156f.json and https://artists.proofprofile.net/proofs/artist/68543f8d-1e16-4458-8aea-698bc4ac156f.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 0xd43e1feb84aff962be395bfe86ded3e2c71b29e4d423b6627ecd2a195b672a83. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BX3YF2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd963a05374510cb390fd26679861a462d2837012f481aa1da32ae889716e1f1b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BX3YF2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3190634385dfbb2ecdca0238584f919815002a62acc6cb05ba164afcc9cc865. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/BX3YF2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa302eafe3871669e82f76f8e618f84f289dd3aabe85cb3602039a2e6269b48b1. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/BX3YF2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ec16c9f16393636961d6ccac8efe924d23bbdc1b7b690b1d5e1d15882ff7bf. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BX3YF2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715f9a319649ac6a8ba26a8a45df707a09202c5f117e507294335d200a79ac12. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/BX3YF2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71640462a4761e6979f0407a6fdb0063efa99130b9ab5b394b02a20643c2698e. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/BX3YF2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16093ee0f2922c316f7e7f0a48268317f56fe271810fe666b19c34dbd699f70a. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/BX3YF2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ff9dd6a6ca9696b1b0c8aa1a1eb593bbe2881404a3c8e344774678357c31c8. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/BX3YF2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ff9dd6a6ca9696b1b0c8aa1a1eb593bbe2881404a3c8e344774678357c31c8. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T08:17:14Z), 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/BX3YF2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6270b64999ba7353a6da017562ebabcbfa6c03c9e76148323b6a749de2e665f. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/BX3YF2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f15360f07728aa5067b18cf8d8b3e65d7be350fcbfde8ffc21f8b6651d28975. 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/BX3YF2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd47e496cd57e2f11c04cbb505c0c2364502a06a5f82039ccc3698fbcd524ffd. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/BX3YF2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc894892102ff81c37f24b4b971197e3177aae8b5faecf989b74c8b8e33c4b731. 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/BX3YF2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1275d9623ce2020bd15596e21886fb1f2eb9226f099d8fb160aad7550c149806. 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/BX3YF2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0cba9f1b29329520980d175bb26dd24b47b42ca8b5041553c9c83792fa2a580. 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/BX3YF2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e47ed9ae1d27b8ad031b876eee6b68bdb003a9f034e051171f2481a25f84b3. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/BX3YF2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4162bfa12328a8173763c846ab4621150e189620e1cdce6665981aa5cdcf6a. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/BX3YF2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa20d7cfc3f07b135ff763ba445d242b460a9d40ea488724d1348d154eed1f4f. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/BX3YF2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58d6ca6dc48ac73c0a0ba6434029375525e07a0404ae0f06569d36e2bec2202. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/BX3YF2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ff9dd6a6ca9696b1b0c8aa1a1eb593bbe2881404a3c8e344774678357c31c8. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/BX3YF2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1092b60ad0d51ba186183985f465e47f6cbc864298e5657ee5f564280108561e. 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/BX3YF2500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b5e0cf96378aa7c68c6828a44bc369d08f76db493b9b23076bb014f9c885f4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BX3YF2500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f855be32a02cf47d9a03e61b51ab44418b7528fb09f0847ddf280e26c087fb. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/BX3YF2500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320b4f571fd341ed07e511fa07ddd621142878ccf60d6204352e7b462463adb7. 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/BX3YF2500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cae218a04f7a18ce315b78679cb0548efb1c0c4d57ff6a550d8bbc21d97b63f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BX3YF2500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aec376d88183e5333410cc50589bb783cae89e146dba22d1c639f9af042e243. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZGLS1937338.