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 0xed13e83932a774be8af36f7c53b6ab610a690cb0af2a2c9f944052d268751a1a. 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/9cca82a3-c16f-4220-a718-8c1921ed081b.json and https://artists.proofprofile.net/proofs/artist/9cca82a3-c16f-4220-a718-8c1921ed081b.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 0x30d7128e5aa83e526d3099e908d7a9dabc67a6228a3acfce940831d9fefee5c3. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:00:20Z), 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/QZGLM2053965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0f5e45df53279853fcdc2dae9a19e57b12615d55c81705484109894e92a137. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZGLM2056066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb553aa5cd7721742d9873409c33b6cbb483217a16bc0740e775019afe18050a5. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZGLS2082991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb553aa5cd7721742d9873409c33b6cbb483217a16bc0740e775019afe18050a5. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZGLS2082991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ea06bafc926abe1cfa1eaf1f99be91e6b958be3bb12e1b586b68303c173a2e. 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/QZHZ52007987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9c706b154ab4d9d7386afe122b2a7be86c7f334d50938427b975a9740c61e3. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZMZ92039904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681d90642e0b9562e9f2c690bf9258dcc90a6f1dc1e6d7f8c2223f20b1babd77. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZMZ92096699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb0acc027cfd87d768f394389a8d6d5ba6ddb22add7b2375639158582b01062. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/ES47E2002410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb0acc027cfd87d768f394389a8d6d5ba6ddb22add7b2375639158582b01062. 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/ES47E2002410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee19a127b36b3feb98e3f37ee6ad30219d04229bbec4d38f4ea8e0809be05b7. 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/ES75E2200619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6fff41a9f26f992d914d92c2c3104629417bdfa8396ddcd62c744a5c6ae333. 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/ES75E2100258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7096f0da2e552b1d1e047c6eb348afe97e044e4902931a39b8b6c1f8ed23aa7. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:06:42Z), 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/ES75E2200620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e780e3ecfb72f654b825c2a8503406e49152138bdff324dd7ecf3410ff6ae57. 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/ES75E2200621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7513df581e9e2a5c6fc9077db0a44f3fb2653130ca5a708dc7d7ded64b2104cb. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ES75E2200622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee19a127b36b3feb98e3f37ee6ad30219d04229bbec4d38f4ea8e0809be05b7. 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/ES75E2200619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7096f0da2e552b1d1e047c6eb348afe97e044e4902931a39b8b6c1f8ed23aa7. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/ES75E2200620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e780e3ecfb72f654b825c2a8503406e49152138bdff324dd7ecf3410ff6ae57. 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/ES75E2200621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7513df581e9e2a5c6fc9077db0a44f3fb2653130ca5a708dc7d7ded64b2104cb. 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/ES75E2200622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22d96c2e2e063b17316ca384f84f84561f8a1426847bbd412b88dac9d8d676c. 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/ES75E2200625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23fa6c3098e805a246cea0a38c7c37453dda7f9364b7727dfe928ac557524e98. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/ES75E2205688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a344039a8f4489691359eab60d5caaf20d890a0803cdc646b572874db08793a. 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/BK4DA2301814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a344039a8f4489691359eab60d5caaf20d890a0803cdc646b572874db08793a. 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/BK4DA2301814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcafe437e4291b26dff8a876d756f87ab9dede877e284f606dc8bcce3503076a4. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/BK4DA2307720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcafe437e4291b26dff8a876d756f87ab9dede877e284f606dc8bcce3503076a4. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/BK4DA2307720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4823a1cb1458eb76775e64c51e1bc50d90480285b91f8b1d1f8209870a382e. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/BK4DA2308448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d7f810e62c64ceb46727dee6d80c1b516ffd27b78fd3bc054813fbc09f7d45. 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/BK4DA2315761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58146f61ae96ab815de339152ce3b0523fac389abbfecdecc8b7162c6a508bf6. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:45:55Z), 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/BK4DA2326118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f166636b40775fc6dfb18843b1f6e77c757d309faea8ee90ebb567708e41fd. 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/BK4DA2326517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312181bb9cff42cb25987ec3823c24eb80e1cb2c8a7fb6f516d7f0c41c5caad8. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/BK4DA2400369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ebf4b0913388403edad9d30596c9246532cea9759def3f29865219cebe2506e. 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/BK4DA2400370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58146f61ae96ab815de339152ce3b0523fac389abbfecdecc8b7162c6a508bf6. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/BK4DA2326118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e7b9c035cea667efb3509fcfde7af5325784ea9171a7628fac4eb88e19f946. 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/BK4DA2400366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312181bb9cff42cb25987ec3823c24eb80e1cb2c8a7fb6f516d7f0c41c5caad8. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:36:59Z), 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/BK4DA2400369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6de82f6f9bfb4c64be6b18254cabe2dbbc0488181634539ad2a36a4534fb3b6. 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/BK4DA2321969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7709d3ad45c5eafb2e2caa9d5a210e5a9631ee6cdf724a2f4798f73fd6b8fa32. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/BK4DA2413849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5207c8ffb90ca19c9d8bd3c6e9140fbeb327535ce161f5a1fac747da339cbd5. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/BK4DA2464917.