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 0xfb00d1eec8e75e2a4991d16c69ad3c2953022d7ce284fe0fb04033282be3e1d7. 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/42503d9f-ee1b-4df5-b303-556d388eace5.json and https://artists.proofprofile.net/proofs/artist/42503d9f-ee1b-4df5-b303-556d388eace5.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 0x3436258f5faf3817aafd2cd7a6ec425f482daf56b25dd3738ed520e90c31c947. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:55:36Z), 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/DEU672002032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a6bccee3fc7712082bae95240546ed40d0b70fdc1bad2dd160cfc5669e1989c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DEU672002034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5c7e5e5d446f5c16cfde0c1e6cda6279d375eb6da42c1427f816ccb0e31a1b. 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/US83Z2108728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81688af8a15cb8a4b1a419e04d804247eb9c97a603582f7a671018b2a8cf2bd7. 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/US83Z2108731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a0eee24386fe7d2d00c72f12b3c97fd369b305c36eb6e442d0d84553a51036. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GRHUB2110018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c85c7c1991d6c54b5f88f6308058d7b45e33d4bacd9fe37b8740adcf47aef7. 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/GRHUB2110019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11995db783ed5429f9cd42aaebf7302eedde8bf24e8ed66b814ee1555c106d0b. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/US83Z2142984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a029ff8af18d0ad9d8294e51df5aee532d5fd0632ffb48695ef32b66bd44460. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/US83Z2144491.
Apunians - Seba Campos Lo Que Tu Me Das Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463f6c7812bba544ce2af2f8fc595e4c574a317392601a4b6da926fec1e286f4. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/US83Z2144493.
Tribu Ancestral, Vol. 2 (Compiled by David Madrid)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9212a8e007c129115d7c824f090b24c61b5328d317202266f6dca3f7d6320417. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T03:59:59Z), 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/US83Z2149363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53db1856466a086899fd77f89476d5d718794ccf99a03fbe3e0b24f0f44a25c2. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/GBWUL2255081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839767a8c5395c22d8693554ddf1a95ee098f32c9a218c90e4a17e4f9a47b9e1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBWUL2255089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d557a713b5b1025d692884aa1ba1115f43261e1f943d0a3f7bcb781ed8d187. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/GRHUB2210020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9d9e6659b61d56e947e8e30fcb07e29340fb23497ea1229210a6a994ef8fe3. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/GRHUB2210012.
Una Hormiga (Marco Tegui & Munaylayt Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905a6873e0f34582aaba67b48a6fd27d6d7c688dd3209b5344393ee4a2a44f9a. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:40:32Z), 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/SE4MF2300548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd34aebadb519df005d970b203eed622a6c7bc05ad7add1ac7207914084094e5. 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/US83Z2320755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c30dd2a91f86adb4ca4211681465182de54a84b4e94d902ad6ae787300f63e. 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/US83Z2320756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8e2278f1dd08face6e5234e269f004385c57c60fdb445a49d11872bbb77e23. 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/US83Z2320758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa195e964fd5d5ff7819c55cd718859707e80b26adb08914a6f38127d74063508. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/US83Z2352136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15afb207eee021dda26055f4f1f18b3826bbc13e3efe430ea1555befe7b98ad. 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/DEH742332833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13f1ffffdd8c18a5c1839da4ecdc5ebb5c0411afcf27d87f35789af2f65daef. 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/GRHUB2410023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be914617636d753d68a6454ddec6972b738476543a92e62c26b603aadf27a6c. 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/QZZ7V2407537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232a41d491e699c8eb3fcfe66e11d5b8c386a7c5bf54e70c7a52b364a3422eaa. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZZ7V2447873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f73ab833b0049d33758c53861fcad967ac6e565d04caec7a0d6128358ee0918. 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/QT3EX2491506.
Rub A Dub Dance Anthem (Seba Campos Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090a1e36da153c9339b9b660cd360b9f3560e3e3dc054c3ffd17c8f187052add. 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/DEU672002994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c67da7cdfd9fb561155dafeae70389befeddaf171b7fd7898f3f4843d04933. 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/US83Z2216110.