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 0xdbc55ad0e57fb21dd07d26c7f76f3cd39f0380e1a8286390c5a6fa18009e21eb. 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/55126636-5df8-49c3-8c62-3bdf5dd2060c.json and https://artists.proofprofile.net/proofs/artist/55126636-5df8-49c3-8c62-3bdf5dd2060c.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 0x0e3552d1339fe5971e40b55b2b9d8d85326d984418d32f9f5b8edc7312a50765. 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/QZMER2260733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8635516c9d12d0dc5eb11f9c6365a06fd2aa246be32b08ca43513aa9f22725c. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QZMER2260739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197a1ea6ebc1d315f70133a6fc944e37ffdd056823a374fb6e57904a5e4c94f9. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZMER2260734.
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 0xafc4a4ba7f661712afdc6fbf1f6fb093c9aec6ac189aa278c8765da11af13729. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/QZMER2260735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f2bd3d6a96fe708475f311d1bfc35ab0a362ce3b0526ac7739673e436f229c. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/QZMER2260737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4f88a2e84083a189e9b9488830d50fd4a83328f94ebed59668eb11c32dfce1. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZMER2260738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb4989e73a3659d5ecc156fafef83331a07c7c129f81d95364bcc78b6ebfafe. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZMER2260740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6b1d0963225c4ad08dfe4c3640806f2e37277b17482d59a363b7944fc44b15. 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/QZHNB2405480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036d870209e590acd79ab97efd15e0fc9c0b13a44d75a06564ecc28510d9a270. 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/QZPLS2396005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0161dafd422ac0673e34f40aa0a8e4b4462b6e925f508b61339c7b58c1192d60. 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/QZMHK2345848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5099c032d701d3dd757e1190512a4d294024cc627fc9cca7a35bfc46fc615b. 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/QZMER2307828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9827210c60e196dfe61f6e197bdebcd002da23102967c9dd80a38001f33f4457. 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/QZMEM2340392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a38af7d1b3552ddbba05aaf7e1828f3831696effe919e1ec27c6cb9d8a0b8a. 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/QZK6K2376448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4047d314f4894ea5875309f0f24cf88488b6867dc7c00aea4dc9be6347dfcb4. 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/QZK6L2363418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497eae4451d4f8bf6a03d81151f814f7f131ef44a8c563f9c7e196d5336e74df. 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/QZHNC2345115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5499612e18cb072c4f2b1f24342af9202b58f90a0eee0728ccc8603e66c0fb34. 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/QZHN62376309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32b3312192168b12efcab60ea997937844661267c8788dda08482139e7891d5. 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/QZES72312799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd747e276854f1788ef839a576f5e9853d1ec2b6f383ec4f2d2be0c2a6263f3aa. 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/QZDA42337292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1056408555c9ee3c942307be4b965a3d430bba91c7f474cd7e3c69ec725e59. 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/QZFYY2327996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef462bfc1efd44c9e9d6a99f9a2a50fdc536494ec9b7344066abb7f012f248b. 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/QZFYY2327997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28c58521c1413431012f5610927cee14eef7b5777da2b78ca4b0536e94c6247. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZFYY2327995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d000a22723ebc1bdb25797b80df8ea939e31ccc3d25d865208151d5f6468d9a. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZFYY2327998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a88facf6c33583c3fe433dd769a368f22826ed5acc07ebef295510359ccadff. 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/QZFYZ2307277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494a188665106f17dd3b522e5d6beff6e3280f793aa2dffdf861b2a772d8616c. 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/QZTAW2200146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8fedc47d039207391b1fe7d0ab4d7af1f0a7a5da2d59d6719f95b5555940fc. 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/QZNWX2231170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897aeb77273b482c472c5194a7e3a456904ce3334492d7c8b3db8005e3489e48. 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/QZMER2224025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff1f886d2064840bd91d6f9c269663d14ac0f3b12f2d1a17d4f02fbcc1b2efb. 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/QZK6G2203465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ccd6da7b7f1ae9cd7ea42b9c545bcab35f4d308cb8d99b8098e723f74792d85. 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/QZDA42542294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659a48603369f9b8cb2f9ab13dc8aa08a2acbd8682211db7049399a6f4613c98. 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/QZDA42542296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0979f43bcc062c47ef7009d79018e32e372e231fdc741d534ba195fd4074b03. 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/QZDA42542297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99b58253735420aeca4f246172400913e0cbcf3017d0be94bd0a1d127fdaac0. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QZDA42542293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcec06b46631dd62312454a37e191034bbb2dd12ecc93250c6d328022e83c262. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZDA42542295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0166b6b6ea305d1c052e43c88585c2d1b828474ae19533d263fcb1c279b3e3. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZDA42542298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502c4ea0683856e00b23f1ac2aae6e380ebc42d809c955abdfa50f74bb5a46bb. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/QZDA42542299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe832e543077284f8a1fcef0867bc59841c0e5a83dd02dff01e0bc4d3f1864299. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/QZDA42542300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f3164e7ef2e596f2ecb5922fccce382707510ff565133e4d9b5bc4cfa4684f. 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/QZNWY2487849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458097fe24023dc5f2447a8a9b59eaf2908c6138257170f74482bd1f29250888. 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/QZNWQ2494476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22139270b3be2186d8c3ca951e4f5d31aa266e785026586c6b498401d7caf175. 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/QZMHL2351373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09b3f7003c6a7e3c78d89c7a17d3944656f3cee4f072c80acc0fbdaca64d587. 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/QZMHK2229746.