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 0xdd364542a7812086863063c77574a3f9e794249b4df829b15007bf4e3803a37b. 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/3993669a-3bb4-4f5e-be42-1185d097d103.json and https://artists.proofprofile.net/proofs/artist/3993669a-3bb4-4f5e-be42-1185d097d103.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 0x1b6dceb7a7ca56bad3f3237467b22b6c625cd50fbcbd40ca79de33dfc8b37118. 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/DEKC41202027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b3f0498c30a70db4df0565dcff6738b77564f2654715519a3c2da20dc0bc90. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DEKC41300156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf57a287309d96a82fc2631ad776ece553e87f733d110546e4ba7f7c7a9d06e1. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/DEKC41400054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1643180667afedf961c258ad6f82895e2b48704a4b1d6f229e997424410fd4b. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/DEKC41400055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb189ca2f23dedee8eba82f1c126b604d7d9fd16ac3af990decc262c1a6061462. 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/DEKC41400056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe010b006bd4ecc398026e0692c95512ef467c846a9ed5cd0082cc7cbfccb439. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/DKZVA1560740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45503d9aa100efb1b5fd1ef9e190ded603ea2d763b091dac9274bb2cd5ef64e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEKC41500044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f60e2466b68a1e0befe57a1171e537d6e254e3f0078f634ab6d127e8bc12bc. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/DEAR41611209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab287994c7c737e8e7073290d9f9640f4704d7ea1f1563e26d4ebface3593fb. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/USA2P1654541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2403f99ea60aa4230da01eac5f5e44872f4dfd3a4878ec88bdf56b865765f1da. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/USA2P1699755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d64728598af1339a3d296668ff18937a37b12e719951e814dff62e1aade4ca6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USQY51732996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95319044eb9fcb691b198e3021d9a77f4368caa0b1f0b2d107ff652c577763b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBKQU1828581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c78ffafdcae150471ade550490ac1307220317dedf33917310282489cba8b0. 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/DEKC41900060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0fbdc04a2cb347f806a00bbf91e5d344cb1497d65bd73681a666e342f742c0b. 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/DEKC41900105.
Polynomial (Yestermorrow & Synesthetic Remix)
Polynomial - Yestermorrow & Synesthetic Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8801d5d267d8493bf30b3639e9946525fd3495cafad650f6de53bc5ac808870a. 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/DKZVA2000251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb123c63df489f04519242b6942affc9d55c0d50b3fa0f866482ad86824e7a3eb. 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/DEKC42000090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe89467031cec73ac9e5960a21b30fe1781cfb039fc143085e6c0a9b287000a. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/DEKC42200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1f3a097fd1036c213caf76ec46d4d844e7422ebf33e87c8497a742cbec9e9a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEKC42300078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b30029007c2d4f1aabe50b982402fd8dde5d5fa6aa7dd3160413cf248b0c449. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DKZVA2300315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ccc83e1681508594b4d05d65413cf555c4c525254e9d0c85d9590f42d73b0d. 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/DELK11400063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bcd38cc98d1727a7ccc72a5f6244f56fc0f58c230816761b11a9ed330406fda. 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/DEN061801022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x265920b3fb91dbfdb0d644900223c6d95c2a493773209d1deb51bfbe96fccc61. 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/DEKC41400088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf053d39a407d2db67b1c28881037741f0fa08c9c3051a0f20a80f6ab02d53146. 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/DEKC41400100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6480fa7242db15d163a51e05652a1d893104b4f9a45d6b48e69377fbec6d761. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USQY51754422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1078ce3a7ce84b11a2f70ba28a18d89020bdbe22107de1804b2704d00fc3a5. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEKC42100047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383faec8e64ecbe28ab1f2a1d34061da56482ec9363a51c494a4faf822b6b6b7. 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/DEKC41500024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45503d9aa100efb1b5fd1ef9e190ded603ea2d763b091dac9274bb2cd5ef64e. 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/DEKC41500044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8fc70d2b9adb413d3d8d5e51123c39b112a82ec73f8248e474df2d84ff4609. 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/DEGA21401442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd9165d4779dbe0bd8bb8fc75d76a78bdb140fda138266184b0f58df76d7d11. 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/DEKC41600111.
Danish Delights (Compiled by Alexander Descroix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822fa84c2f68e2b93fa48c60c6c6f6226cdabc9cbb3c4a97e88ae7c5d03c6429. 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/DKZVA1360274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9453c035541f21b0517f3b430f89dbb7b2e2e555589021de8978332463e5825d. 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/DEKC41202006.