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 0x16a0bf5d08e2583583a9e1b1225644f5e2c6d19bb059a4975b343ddb237ed48e. 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/6dc548cd-0bf2-460b-a072-efaec69d7e12.json and https://artists.proofprofile.net/proofs/artist/6dc548cd-0bf2-460b-a072-efaec69d7e12.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 0x96bf830018d58d2f79ccfea655eb12a014a8481b8a96412d03aa8c39077cb8a0. 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/TCAHR2333458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62fce5497a95b24cd74cedd5efd1286085c2aee5506aa43852a30ca532f4037b. 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/TCAHJ2319342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f012073c3ee6b546ecd791a4222ec864bc61afe2a4a70d592ee823e98b6ef8. 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/TCAHB2358374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabecd29cdf4f33eee076c55be569a6f566daf24f5d74ada30293dc3a50c99d94. 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/TCAGF2223893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe68c09d79010d32ac2559f943021212c813c13338b752f6fda114a87a99d3c8e. 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/TCAGC2262808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c6966c8801c583a51c1e75998f984f824fdf03a638e0c69b08de104e165ca8. 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/TCAFZ2248994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f305bb01cd443e4fe36e1a195d40b01d48d73e3cb0cf653ac0927ef45853251. 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/TCAFX2193711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb21646e6314b52fe883ea06b2c1aa7eadc8bfb2ac353081de32f199f5768b2. 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/TCAFU2160719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44dcb4d1699eaceedfa2af5cfeb858a54c6a4ab5da6fc2030061b94921b49356. 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/TCAFQ2155583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc841f13ec1550dd8c4e74f283d17ea40b43a56caa8575adb2e2596f8ebbd7fa5. 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/TCAFQ2121131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524872f92a537702619cce85c51d81c544f5734c35c45804d5504925c28e1602. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TCAFK2183241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6352b73d5004c52a5fbf9599181d858a2c36c11f8c92cfd30ad670f4f4968f. 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/TCAER2011726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a26aed426088c48c1337a8a93abfbb37ddf20d5d266b7978600b3588aee27ee. 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/TCAEL1985080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9055ad54566146e2a11319932e3e6eb72f062631cfb595e07383b36153beb3e3. 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/TCAEK1906437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d1107f4e07de00a676c8dbb983a3c18290e9469ed4e37a2e6ac402ce3a7a4a. 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/TCAEG1941746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5681b5853c54eb7c2da878ecf37167f7ac3ad658d9716e2824542e379fd33bc6. 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/TCAEE1923328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbacf2ee3015e4cf514be7c38ebae2142f131334fda7485225db0f0512540c839. 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/GBSMU6210314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373bd88a821d4caa49bc5f8c9ddc6cbf979eb8dc427f0f88fd0457f479482fdf. 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/TCAEA1842180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aed35b42d04395ef3eb12ba273af6e5c06fcd3b74c3b5a60109f31ac0082074. 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/TCAJF2529784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8dd6c23494e7bb1555dcf6e4d6645cc5335b46d6711fa6bfca206b17801ff7b. 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/TCAJA2429243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3e920b25346093c6af58973c65b14fdcc79039c7f8f1c9cc5dfc7dad2fca0d. 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/TCAIF2491984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3220eb551388dffe4eb680533845bef0e9b72e13e2bb920bc79c743405198cd. 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/TCAIF2442321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8764c3301e46b3b432981405e07bb0195f5fadc84438dd1f890b84d8ff7c0e. 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/TCAHX2492921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61104bc9de6fd977c76938af6ad8780abc2fb1e62aad60bbd96345e9ab56e68f. 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/TCAJL2560000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d817a7c2473d9ca0ad957f041cf9f2fd0aeaaf22f3883b4a5df4da10a2566d3. 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/GBSMU3646848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f33ab7018a525f7ea82fa5e7681c369b25f81402169996ff1ab758e298b662. 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/GBSMU3635007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801e96a2b8f179e6c73c5a02201888b6adce4afbc5e8d841bc196c873558a3f5. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/TCACP1641221.
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 0x739e962fb52a922a2040eb0ebda72c3d0d5d45e6cb3c51b707b1b25532fd7fe1. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/GBSMU3611730.