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 0xea9939aa4bcdc5f21d7b412c28a7bc6e492ff1b390ac0b1b4c135b84c37cc03a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ba8ee19-8341-4378-96e0-2be83cccd565.json and https://artists.proofprofile.net/proofs/artist/1ba8ee19-8341-4378-96e0-2be83cccd565.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 0x0c60dc3dd04977c922094902e3ee781bc7a17fbbb6031295028c1f8e9c165d18. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/KSA002202450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5979460ae62d5c1699fe4f62428032e7ae6ea38ebc47bf23de1122f02efdf99e. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/KSA002202445.
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 0x67c07f6c652d4d01a744d16750b8d77073e688ae15bcfb190c9ea1d8b9762d4c. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/KSA002202446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2c2323cce7133a7987e01cfbba0a28dba1ed1897f7651f6197c17b55c7266e. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/KSA002202448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f95cc5d3a97f5122bbeeb19d8f473b0c20a092f7220b6caa30047497214aee. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/KSA002202451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f9786ec374e52eaf15f19e370a18d746689a8f91f8d283ee9b97b5cb8dc72b. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/KSA002202452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4165861640399142b98f7c03dfaaf867a80318c2c534aba69766b1f1262ca6. 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/KRA252101506.
Like a Sunflower (Feat. YAYYOUNG) (Prod. OPO)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f14468e6494a1945eb725a2a168834644048b2c4932b5f6e660a9d5ab6130c4. 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/QZF452001864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4492c41c08f999c692a8fc7cfb7e50f2442c33ab578c77098d97140d33d8f659. 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/QZF452001865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf967842788f16efe22a7294bb33914661a696fd9290cdc2874d424de9f445aaa. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZF452001863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af1490e03c36aac6b8780e9779fe0c0b5bfefc8125cbfa6c175a88a0a739034. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZF452001866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786210fb41648814384b55426343da5b819a1cf94a6b0cc38aa5e96ddc66d1f0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZEKE1928322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ccb442a29ee0317680907e3315db35e1aa4e74b354e125f90f170d9f3bc3a6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZEKE1928321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269284326c70b0382a53728046a2f916e4dde9ace32719812f45b04aea0f3d2c. 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/QZEKE1927828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc182eabc7261b571a283a493f84c81f8f2cbbb0762530d8cb530958f2935d9d1. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZEKE1927829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02fca0c0bf89811cef403a834584a96343d2594b8913e67cbc96dce961498032. 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/KRB471901461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1994301cd7afc7d659471ac9d34cf3f6d9e540e9673b829441cb858258c7ab1. 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/KRB471901246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c2dc9fe4065c31a5f3d17127b8f1369cddc10abf7c73ba2a263b1eccfda7e7. 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/KRB471900741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b585218467a87c79091f84c41a56b40e90eaeb55474a87f05781414caa62728. 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/KRB471900742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c009ae25ca3fca9857790893893a05dbc7f204a71313622cb0d3be58cb0254. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/KRMIM1810243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12cc055854ab4dc25088094042eef5f2712f503a3776c983cace6416a06b9846. 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/KRE021800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35af346dee9d025ac3c1934ef27728ee1a4941b48acd4741ae64d77b4e7b54c. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/KRE021800018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2fbb1d9d7592c88e57272e16c0f88c38a8606872ea4383ab69668e3427cc77. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/QZEKE2010348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee458fea793f6954f274c6ab150a0e69bcabb00c6f07a680756e4d5682fad03. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZEKE2010349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8fff75eb0509371ad71997f8ffa8b4b1a1cc4d17769a7e179ab6ae25102b6f. 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/QZEKE2010346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9d1cbb52a4e378fc86b34a357c375e40cf517ea1e9f543f750caeb4868c94c. 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/QZEKE2010347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c545db3aa55024da08210623a17b7fb2c6b30a8d36e25a8ea12849a044a1ce. 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/KRF631900759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8dbb591efcaf26bd0a5592b9f78c0c96cdab745575970bab0dcfc8f14043fa. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/KRF631900758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d347bad1a456db547df5ecf4faa26ddd22530a0cd28e5f82c65754baecc024. 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/QZDA71918711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc30bcf1ab65c94eb9bff7d40951c49f4d1568bc301025e8fa29c264e920737. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FRU701801038.