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 0x4f5ae23006afa08a0b5ec921454fcf66994f7d625192a67b7b596687298c016e. 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/666c5876-948b-428b-b4e6-3d2175ccc648.json and https://artists.proofprofile.net/proofs/artist/666c5876-948b-428b-b4e6-3d2175ccc648.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tao Thấy Tên Tao (feat. B-Wine & Larria.)
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 0x0c5d79199c67d71f55f7724376305482baa626e33091c39ed31defb8159fe769. 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/FRX282071709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa572cc84686f1ff0cbfced8e9b955a46524461f8231ea4c07d325dcd9c2b6793. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/FRX762036279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7cd121415aaac6e784dd41b77a052dc0932b54bb694621c439774d39f8e8df. 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/FRX202309865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ee20207fcb7746b6928255bf15f6eb2a4e129860ccbda3dd3ed4e36fc84f81. 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/FRX202309867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010488d2201c70d809e3bde91287668cb7ca6e498201b0e401dadc9f36815d97. 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/FRX202309869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411b5a2e5321344bc220332b4dc787273a1dc14b7b9c4809089d5e4bae661c45. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/FRX202309870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6de0cf85834c175cfc116b610d73e6751964c772dc39166eebc71fe38c153b3. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FRX202309871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a51b83846538c835c5f97706e43b005477f2bcfec8be365343ea3e4772c3bb. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/FRX202309873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8eef408f59c7fd042be63c77e0e9fd99a54b0c981a8ac6c99fa794e6da96296. 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/US38Y2420146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10e1fa24b6e51721bce6582e837cfc5d5bd105495700635d58696709ba1aedc. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/US38Y2420817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cde561d8e49b533dc79341ba58fd7f514c482a0b61da9c70978582367841e69. 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/US38Y2434527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a2725aa13b509a121d15d2f79aa393df82898953704ef1aeb1a3a3f4c5163d. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/US38Y2553319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a520d9565ab11db627c9464283bea6e92ec2f14e3a786d7666f77dfedb924f. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/JPY202200239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b343e1e3963d22717b1bb77734b0ba9af4e0156d87d6d1ef229cd25e1b5912. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/US39N2309275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096e64832fcb08fa50db80f39799c58305f19a4285efad6b295d1da488a4c0ea. 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/US39N2308510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be0445d29a1f3a1795560cf286b506e7cfd18def7c2b824141c5bf17031b1c0. 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/QZW9L2418269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c642a39ccdd40eb3871e72133f2f9047fbb626513a8447ae73e60972da0f7e. 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/QZHNB2508192.