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 0x08c358b92a103e5935e33b977779cec79781b617fd7dcf6b65bcabc539223d71. 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/34038bf4-00be-4ec4-8773-4b9ed5d36ae7.json and https://artists.proofprofile.net/proofs/artist/34038bf4-00be-4ec4-8773-4b9ed5d36ae7.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 0x2a9b276216aa2385a2d6e0903c1221f963c128bede35d7a648ed75c43e162863. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZ4JJ1629907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb9642660226a40222229cdfda12e14d9c36546874850f23abbd6e63ef0ed3e. 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/QZ4JJ1629903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfdbf4b8fa481ed53507d3db092a837d84dcb5d5557d00a79d187ae8bae28029. 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/QZ4JJ1629793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe060d1ab1dc18d130a3bc37a5e559a4fc4e1b33f2d4525d73dff58e7d3db8f4c. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZ4JJ1629791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3964fafc23d491311d61c77b3553ff40c5a3d9d3b012fb829b03743fc0c00c7e. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZ4JJ1629803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433e16b2a5d38999398cc19058222405ae697cd1251b6d8485b389a33468599f. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZ4JJ1629810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa7670ba4e96ed0226061ec1f3d7a89afebc22cd7a3b223dc28f753304eb935. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZ4JJ1629905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b247914a8043ad1566949f7a7e3846be07f1ede9d75d31fb9e44fd021513ce. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/UST8K1683561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a64507fcf2faa2f4abbd797f8b696e8cb7f69624f20c1a71d4547675ea23e03. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZ4JJ1629751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11058146d7bdbfc092934e589d6a8ca26582221a453a1faa617fbb47bac767ad. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QZ4JJ1629761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2eaf005c8a87828a73e1b73f30f982f63858f12daa41c48774afe1298033ea6. 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/QZ4JJ1629763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0b3c228397ba05bb679aa714e2bf78fdca7aaa0381c7002c2e9e6ae8db4b36. 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/QZ4JJ1629762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1bbcc74767d344fb4fab4f22dfe355c5afeae5e0d1ca1dc4b93f65ed3f3a82. 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/QZ4JJ1629764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0433a24ae97288bb8a435aec6725b7a880b99c57d04c8f6cdc4f41f91b7b29. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QZ4JJ1629759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf993bcb01816efc5763e40645330d99f6e54d6090b4ee9713953e6e1279c6f49. 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/QZ4JJ1629772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9a707854ae2a98359bfd6a5f5d2c763db9fe6c2d3eb4240eb90c086eaa2126. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZ9JZ1731613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d46c02e11bf3a7bee711221aca906eec02f3b5ebaefb7b46758f689ccb1df4. Chain 2 (Bitcoin): anchored in block 957826 (2026-07-13T08:56:09Z), 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/QZAPG1753854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16dbdf7fdb6f070f0f7a03c646ada39d0d6fda20ad791338c9d62ada8ad5bb05. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZARB1841664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306d8137a97e809e7c54b41c5e7e470901589a8b57b0a012140854c7f7c66288. 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/QZNWY2016910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2efcadd7fb362ef1cc043c54d45a390cf2e7e35c30a4dc198945d61bfa734f8. 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/QZES62233193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe825298de5496a852ccaac6f0eb357a20adbf352539a9064dde8051e7cbddb84. 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/QZDA51858872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb98a82d9774d9e271b9f6ec79ac037c3d03aaa1b1d71443b3f7183f20d5679. 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/QZFZ31988833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce67ea25b352be3def332ecdba6c9810597407f656b7ed36ff2fbbbb15efbca. 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/QMRSZ2002419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f4e8371017ef3a6a09061fb022ad34aa553008db5296ddb4e7e3f0595a3d99. 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/USUYG1142050.
XXXTENTACION Presents: Members Only, Vol. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3dd469f9a7c8212a7e29992ca2dabe2ad0a2a93349d3d7317e8f38e7b0d333. 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/USUYG1151241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2ca7ccf317c1aef2b45583ea102a46da32f44860a38dcefd4fec04337d7897. 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/USUYG1151248.
XXXTENTACION Presents: Members Only, Vol. 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7906eec7a711347cdc927181d21235b82d99d3f3f0f6daf4e026f52c54c36d6d. 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/USUYG1237273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe369080a615f76bf44f1b39b31aaf48197a6ee86d06a49d1be157e51c3492fe. 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/USUYG1237296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b7462d7f4789ab0c2120d05c5f5eb25275624509ee15287874ed41bb45ba5f. 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/USUYG1237337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64d11b70e09147dbedf1fa187e46e259b201abc82c3e19893073fa8f4b3ef1b. 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/USUYG1284369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75efe077df7f1b4ec1d54e9ac7a9c2562e9461d91dcb6ba88d9d8406bf7b50b. 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/QMRSZ2200024.
Pentacles (feat. Omen Xiii & Killstation)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7936ff0ed7ec14f123ee435d8c2bd68a69e39a949722dc37ce6888de7458e52b. 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/TCACQ1603823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99224169eeccd3ff9100952968ddc87ce706560e556a447ce5cb3b9d6e5d3605. 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/QZWFP2397087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ca6ad156357d31ddedc7b51bb7339feba213d77e47e6051e57df01b7c4e171. 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/TCAEG1947445.