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 0xd8cccba1354b1d9e5d29f16bd3fc0f6480278626d52ba98ede789b6b0e95f7dd. 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/cab974a1-fca7-4ffb-9a7b-c5a2f6c4cdfa.json and https://artists.proofprofile.net/proofs/artist/cab974a1-fca7-4ffb-9a7b-c5a2f6c4cdfa.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 0x5499e529bc113df0b5df89807ed742ea7522fd141b9e8646025f797a4fb1d24e. 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/DKUM71700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a84bf8b84bc7dd43ca3649b05dc2d241fa9e2c82e9327cd9588ecfab3281895. 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/DKUM71700182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84557ee1f6b3b2f7c5beeb002830d8346967179391807da0f5bc8dbdde65b01f. 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/DKUM71700522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8705cae14a3242066c68bb1bb8ac7b15144d61f5def266987749504160988922. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/DKUM71800162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x267d8a1e6acab4da7b7f476eecae72b88924e76a647fb8a8bc50ab6c555c881d. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/DKUM71800163.
Traitors (From The Motion Picture "The Marco Effect")
Traitors - From The Motion Picture "The Marco Effect"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6411bd2e02cf72cbb68d872c7ad7a39e4385f950d67a3afa66ede7d552a717. 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/DKUM72000810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11246d6717805286fe2f318b145072206069e0557d431b88add3053651a44654. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/DKUM72000811.
Traitors (From The Motion Picture "Marco Effekten")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e2b36896c6f24114a25fbd600ed2e72ab2a4cd9e0b614d0c24105eb7ffd25e. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/DKUM72200209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609a27981c0b40cdffb97c6fab4506d21bd42727a4ab475c4e730ce77c2b3599. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DKUM72200203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ff9240fc5f4c8297612dd85af7f15460a4a2b9aa5c2a51dedddfe2d208d18b. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/DKUM72200204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead0b4d4ae2301dab5b9fc09b245b088d6881e76316636c3a3484a09a766470c. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/DKUM72200138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e4cc5523167ddc1865c4a58391bd1668c87b5bb6624289ba21c37ad5fedda8. 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/DKUM72100538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ca2d1c9fe2288bc1a3f408807ffa9da4d569d81eb02d8ed760fd19a3d259a8. 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/DKUM72200139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4202f746fc56f85ed52fc002d6a45bb2fb2d5bd3ea213de5eaf2c8ea10dc64a0. 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/DKUM72100508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead0b4d4ae2301dab5b9fc09b245b088d6881e76316636c3a3484a09a766470c. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/DKUM72200138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e4cc5523167ddc1865c4a58391bd1668c87b5bb6624289ba21c37ad5fedda8. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/DKUM72100538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef891073db14c0e57f27c54d35216cbbb36623c76e462bef15f6f457ef9ae58. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/DKUM72200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ca2d1c9fe2288bc1a3f408807ffa9da4d569d81eb02d8ed760fd19a3d259a8. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/DKUM72200139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6959533de2edbcdeef3772592c79796c45f08a872f95686dc0034666578ae3. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/DKUM72200201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2880a808645a44ff081a17355d9693a6243f2e4ed8f42053a71da4fb1d5b9c66. 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/DKUM72200202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4202f746fc56f85ed52fc002d6a45bb2fb2d5bd3ea213de5eaf2c8ea10dc64a0. 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/DKUM72100508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e2b36896c6f24114a25fbd600ed2e72ab2a4cd9e0b614d0c24105eb7ffd25e. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/DKUM72200209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609a27981c0b40cdffb97c6fab4506d21bd42727a4ab475c4e730ce77c2b3599. 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/DKUM72200203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ff9240fc5f4c8297612dd85af7f15460a4a2b9aa5c2a51dedddfe2d208d18b. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/DKUM72200204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84db58ed10f6a647337a422236ae6eb98574c0a549a294858fb13fafbed3b789. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/DKUM72200578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd368cb58944a9347beb34e64b19335cf86f35b6f506f3429af13277f7e9fade6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DKUM72200470.