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 0x73b11ab539b5577cf9985d68f6875b3f3558bb0de49461baff1fda32fd360a5b. 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/5b065eb1-b410-48b7-aa07-ce132d4bd043.json and https://artists.proofprofile.net/proofs/artist/5b065eb1-b410-48b7-aa07-ce132d4bd043.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 0xeaeb0940200a5f3d4f7726441ee969956017077e967e8491f7a57e46883fb9fa. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/USANG2453852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428104ac6df05f661c70126a8ee6eb09cf8c84cd45b98aebe6d4c02be72f5dfb. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/USANG2453873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33f05f123e9255768f88d370356408f41ad1034cdad16bdbace35fbdd843af9. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USANG2453874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e79b70486294ba432b905b934a33145abf71313be0996297fb38c79471dfc0. 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/USANG2453875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2bfcd644efa109daa9ca05a238362600a6cee415d59bb6a5004aee447201d1. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USANG2453876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3ec84750888e5bd897659316ed8d7fa2ae214467c07717de998578d323b50e. 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/USANG2453884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a3c876bd46904dda16b3d49058bfd8bcc8d9e31ada2aac2811c1e10680d3c8. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:50:47Z), 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/USANG2453886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74c3a741140166c933caeabc1dad53df3e35cc8a0aef7647f59414578cf4704. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:06:44Z), 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/USANG2453887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d3b1deab4a7dc6844d1419545ee6017beeca99be3b99ddc97bd5c3396c2542. 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/USANG2453888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11983551e09b0dbe81686cb86ef50b98674437fc0b71abbdb0f7372f2b6bbbe6. 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/USANG2455336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41be2c7485efae38f7bcc50f7576c35072ecd67e7adee212b1918cd2489de391. 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/USANG2455337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04c753077f10ab533bf75c4b7cc86a8f6a864e73675b65fd5dd2d32270f0e82. 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/USANG2455338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3568634cda333189b8d083d68b7a007a7e64130f4d7250229248a55451b4200. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:02:27Z), 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/USANG2455339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaed3bf21b1fc7acc66bc110bfc4e04239eb3f1a0b18b7de818f888097a52a1b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USANG2455340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc279fc2be8d0ba8c7892708067f00e4d7149491f5ec6608d880881d527889160. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/USANG2455341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39e4a71d55bdd13dea012e5edbdbbc0d2162e6cd1eaa2d3e39a6e3bb4fcdc2a. 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/USANG2455343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b40a7a1b96046555a23666726b512ae0c47f5bf102ca8ed4589a84291acb89. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/USANG2455345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f126b6e33336ac1f3385c136912ed056890a09802e652f348505bac5d6e86d. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:42:32Z), 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/USANG2455346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82270a403da90c6845e69a69832d31aeef4998759f9f9cda57f3b89223fa992. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USANG2460221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec311be4f2d667a22e2df2e5121c1cc87fca6c6cee5b5ef393a5976d6ed8ebcf. 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/USANG2460224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0903bab2b7a489171593496dab9d4bc4c41f0108a23a7a4991d58238a0996583. 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/USANG2460225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x265a5a5adc0f628a8dac7b27e286b5e9fbc36b3bc4ec639bf7c83c42b0ae5f00. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USANG2460226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2d5d7ded9a0a31db001afe9d307ebbf78dd4f3796015db84a42d0b1716e0fe. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USANG2460227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72a9f35b6a9d0176712a642695ae91fbfa6912967ebcd5531bdbf63fd8fbd3b. 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/USANG2460228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20fbb38bdcfefb08d4be878c1a663e84f9e29150a4f87450921b8ddede9af80. 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/USANG2460230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457a574d23287b33a3e9f963001730e55ca2c2772f9f778d37fb93c61e1a6cfb. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:06:10Z), 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/USANG2460231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa264a9ef1f8e3e7f0b0410ae2f7c894e78090317a72269ba24ae73750623ff67. 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/US3DF2514867.