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 0x74e1b35ba934ffe076e1faac136ba7959fc2a2fe0f1a6d5feb94ef821bde8bda. 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/889a81bd-d0e9-4e48-8b34-d4ff59d5e041.json and https://artists.proofprofile.net/proofs/artist/889a81bd-d0e9-4e48-8b34-d4ff59d5e041.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 0x8be264622a2e3c76857dafb5d17d4a3721cedb2a625fac0f4438ba3489e24838. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CH7812362748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac8b09c913554728fc3eb551fc627185c35c33c7a839ee8251c6412966e3a4c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CH7812362746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde95ac601e946e4f571343b391fb8981bfc10112b711f1ab22c3f554797a10d0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE5IB2297374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f5ff64d4a0b2fb5dfa77eab46bb8a2896998b824e9dc8df8f5ca1848754e93. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/SE5IB2297371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128fec9eae90b3ca32a2af192a7191814b90d4c570c4716c049bcdc84a42fe00. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE5IB2222289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d8b90591c21b81630045fc55214943a8248e0709b2455d8d9de7f007fdae2c. 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/SE5IB2222273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4775eacf53435166faa3c3c191fe5515afa8822230422e4c199e4f550a834753. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/SE5IB2222241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd901bf6f64c312c250651e5315f4d98a4a5d861959cd282477ab6041de698920. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/SE5IB2214353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93911e7a81de27911ca8cb6ed43d1f9ae48f33dc74a9aa4098d3d5698aa5824f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/SE5IB2162335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b888a0081ad8cacf85118c4520f9aed3c3d667ee3615149395c2438099c57a4. 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/SE5IB2162326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed90313a12e666d55a14d3696c4e02eab358ae368070217965c7c2fe6d5572cd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE5IB2162317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62179ed30658e8378944dc4247004860a3b56db464c2223f050358b8769a435f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SE6N62100137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb525da58f2441f67d2208497733b929db047d845eb65288a8ce4623dc49fa20f. 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/SE5IB2140105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf149414f0d3ceaf85284a87eaf1d1078bbbbab0af4187c6bb90dd880e4ffa1eb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE5IB2140096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d7b48027fa1389e49d27450234145521a1e7e8d53e37f6ec591247dcc84194. 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/SE5IB2140087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6402d157f25daf5c64dcbe9185d3903abb42aca195e38647fb7152c808266809. 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/SE5IB2126281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d035ab985f14ac38cbb54fadcc8bf73de99713cc3048f27234fcc8897b558d8. 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/NLT2H2100543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2347af70c29f9673a68675a4cc50f835410078640ea3bd771cd80610357626ee. 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/NLT2H2100544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd47114bf7aaff5f2ef8c487f57a9b0def93417417c6c9751dd1bd7689e9766. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLT2H2100545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3d25904361ea7a33ce985aa9e7d6da9b84c16acba1beecbb183b4a6366da12. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLT2H2100546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3520dcfe55dd4f082bc3c22d71e6b47c97d3ec76ec0b73e26a380ed6bb6c14f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GX38U2182030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f224191092373897c0398b7aeac63405b451efcf4117113bdb86aa1c266429. 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/GX38U2157305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9cd8e719ddeba4ee8d97f2c1f308f98adc13197f9bfca9a4fd9940e744a8bc. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLT2H2100200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc6c177e252eb81749219755d05982aae90f75e40f1992e4632c909fb731dd7. 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/NLT2H2100201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc8c6bff2af87345977147e811a37d3eedada53c39156acb5083f123bead741. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLT2H2100202.