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 0x195a660892840c9fba16e5ad8cb208a41c06d90b58b2f820e66a367166566811. 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/0b8c6f19-9c89-4b02-aef2-2b2b4dbd8475.json and https://artists.proofprofile.net/proofs/artist/0b8c6f19-9c89-4b02-aef2-2b2b4dbd8475.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 0x0845a7bf6030d350dcd686ca856b7cf1207dca0f82bd4fe5fe26d7c6abedfe6e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE3GO2118001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e37fa825e9dc1a70120489ca66d9c58f5e5b3a6a60eddc47dba86032bfbb7a7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE3GO2013501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe111a7cdfd14fee90c9d0863bc3f7a44e092f7aa55b88626d9d3e4cb72c90f88. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE3GO2019801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa220ee65181d507f3cb24e0d851981da9b43fcd50652ad75aeeefc55beec20d4. 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/SE3GO2117501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bbed0ffe84916c5a2fbf6a67ffecf9be797ee5ffe4accb0fb91f3b414e7b4fe. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE3GO2115501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8ccae8329c96adb94c0bc67c209e291ef7fb6c9906b6ae24955eb6cb272e9b. 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/SE3GO2024801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7608a4fb2a58034be28d6c1bfc4b7db61913fdbb093c3675a8a76a16cbe5bf4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTAS2244564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa220ee65181d507f3cb24e0d851981da9b43fcd50652ad75aeeefc55beec20d4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE3GO2117501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8228e826301fc48a047150bec8dc03fb24608945d211cb43f45a269f796ee9d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZMEM2347151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f098411f68236f07031d247e35e0d1bff1585d8311c2a70a23efa996ce4f7a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZK6N2350197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec67054213d8768f09847090488f315ae68c78a2320d617e769d8f157dfe71ae. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZMEM2347152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63906ead4ffeadf0c3d494dcd0ad0ac0751bc01f103bc5b6cf3bbdb664a5149b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHN52347769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c55413fb8b649b0d73eb13d7ded34521bddb4764db16926781a03b333752a4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZMEM2347153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ff3396554e773ca436ad383990e1cc71b1ef58c91612e2ff145a3a619c7a60. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZMEM2347154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c37df66d7bec32d560a4ef973e11ac43e45849fe869f4632b51b0174f5ae19. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:04:30Z), 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/QZMEM2347155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dab195c9b87993a6c6ea9a80a46177aefb668d65384847acdefe76652541d7c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHNB2281836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb80370bdb3a84e0f0412fd6f1f111bfc9235a01ff431fe2946173a48005be07. 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/QZMEM2347157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6c8a16d7dd76ac1052dd5fb83976246e375c826ca87d2e999676609b5bbbfb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZMEM2347158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa76a4a698eb846bee3d36199b4d3d5a2ac6d98bce7e5fcee00e04a1544c646e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDA42385212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59095819ffe687c346fce3a92456ea996e79afbdba6e2c90369875f100b95ab0. 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/QZMEM2347159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa76a4a698eb846bee3d36199b4d3d5a2ac6d98bce7e5fcee00e04a1544c646e. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZDA42385212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fef110924fd6956c8ecf78e7b6a5a5058fb0b9536b400e0c79fc935c4e2fd4d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE3GO2315901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac24e9694a3d2c6ce141285b050a95970687099acd4cffb9bbcb24cbf8e9df8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE3GO2312201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c5125ece5174ea3a80b1ec10c4bdf7b39df84baf9734f38940d38bbb62598e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SE3GO2308901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63703d060915af59079dbc19eb2eba50ac8ed981d5d15f18fc0c592ff309519e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SE3GO2306201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832adc393698b6fa08f60f33c2003319cdc84024228b2f9213a67d9c0686f97e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE3GO2306202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a35f45e3ef17376e41c508a0108146891d19813c0d32947a61586abd7b62ad. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SE3GO2301301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5288866459db962b4e850251f99cbe91bf98bba134a103ec9e67824757e6e213. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE3GO2300501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c32d9e9a97efac92b2c9ae0685c8130b7b6a34577493884462a8798ceed1d2. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/SE3GO2209901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f18d552881923bd6e27db27a2b358f93352d3bbc5de362aca4e82331f4bab65. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE3GO2123901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926aa4c7dfcbbd42a6a115c4534e7214b79503223896693b7000768cc9b5d810. 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/SE3GO2119501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cbd7add338b0c2b536e17bf95e0dbd199cf3ff1098aaa9ad7a8ec7289974b8f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SE3GO2113701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4643dc3cd970a1171a7b5398797d620bb0ffec6911eb2567ebc20e7bc1c1e038. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE3GO2107501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d727a5db0368c6070c65d15c678304ce2f83fa75339e0d0fa5095ca3faa69be. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE3GO2102401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89360d291a9513466400d601da74e06afedafecafbd313338958d5a28094e46e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE3GO2313801.