thumb|The Royal Palace of Madrid is the official residence of the Spanish royal family. It is the largest royal palace in Europe, as well as one of the largest in the world. alt=|thumb|The Winter Pala
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 0xfda95526abb4414253332d3a155d343ecf2a4e24e31d37ae6ed8788ce736732e. 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/d4a9c9fd-312a-4ed0-ac8f-462a6090b339.json and https://artists.proofprofile.net/proofs/artist/d4a9c9fd-312a-4ed0-ac8f-462a6090b339.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 0x13f45f7c9fc03f6065ff81496473cdf6eb6e9d7c50dfab4693cc43a811a87c7d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GBUV71700398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a9fc11438d0b47931dda5494788bed25959ed5158fcdbc60bd71ab8940ad5d. 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/GBUV71801854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7707b1ebfc9c8eaebf8931403ceda96a6f7394301a31a71f00d613b0d1f97b7d. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GBUM71900511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47454de8b02c33c28fc321d8eb6a939efd1c9cc691ee3e23cff61f50145af8f1. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:05:25Z), 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/GBUM71900508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d834b3fb93dada719b818258f16ac22cacad44f5db99e923c0f42da40419835. Chain 2 (Bitcoin): anchored in block 957723 (2026-07-12T15:34:17Z), 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/GBUM72002794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b6086cf9fbf18493f723a226d39fb344a46b26a1ad2df11868c8ec7eb1348b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBUM71603029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13bcddea55201dc891a539f622c405e0c11165e8080ae3cd2fb29d0d624d96a0. 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/GBUM71602810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d790950751cd4ab9f6f0d66cfb3dd7ab56df995a44e22449d4081c839d602eb. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/GBUM71501091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad04dc3b6c5c85166ff1721eea89dd844c14788b7504d95a3fd8d0b26ef6aa9. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBUM71900505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890589f2086b96ed8e6c7702d00a7e6eb3137a7e2fe54672b491b2ced8315420. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBUM72002795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c691ca8151f8dd33de3e05a8409713c7c9c0b0003ddc88496e5c77ba1247eba. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBUM72105760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c11086e3ea1de0eb23cfc0f4e7e9ebc46599f9f13935853e84d282534804bb. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBUM72300662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fa8fc331ff7fd58e8ee08bbc8ac9fea8bc46bb8b29c76e7e40a5a2f95a8d72. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/GBUM72302179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c11086e3ea1de0eb23cfc0f4e7e9ebc46599f9f13935853e84d282534804bb. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GBUM72300662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf47f1637c7c08c19ec60e3db0e5b5658ccd1c33ef11f3716d60507ab0956a8. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/GBUM72305743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1400f6bd3840f2a8e2ef5a64be3ec93354cdb8a7157e6bcd23a3ee38701a25b0. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/GBUM72305744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb027586b6531df0b974721dcdac258b0ce7b5b5c604aaf8389b8540f997064c3. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GBUM72305094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fac2129301171bbe8c1b8276b78b57d8e15d02cdaad84a0c4143b602db2cd6c. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GBUM72307319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fac2129301171bbe8c1b8276b78b57d8e15d02cdaad84a0c4143b602db2cd6c. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/GBUM72307319.
When Everything Was Lost (Live at EartH)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56c6110743f2bb38d5f7131ebb82f52b8a8ad419bd98e53ce8ae38bfc15eef0. 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/GBUM72404204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03119ff44ed6abcf659f642b4b8e31c453263d15c346b43904d7322eab475b4. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/GBUM72404205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56c6110743f2bb38d5f7131ebb82f52b8a8ad419bd98e53ce8ae38bfc15eef0. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/GBUM72404204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395da8c7f1cef0c855e0a06552440042fe19fd3c26f64b8a77fd0abb3a6ccd78. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/GXFD32400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd769c5df23dd7b0fc5a7f8ab896fa336c1b086c9c49da0dba1b73e7557c2787f. 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/GBUM71603022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54916401859cdf8cf889ffe1aa0fab06112129ee45c2e1cb3db4593e42aeeeb. 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/GBUM71701538.
ILY indie love songs by The Circle Sessions
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b6086cf9fbf18493f723a226d39fb344a46b26a1ad2df11868c8ec7eb1348b. 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/GBUM71603029.