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 0xb376a2f2b45687cde23c805da59358af80b279cf3bbec66e964d61e25c3ea88b. 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/f5ea3ad2-dad1-4ce8-9c3a-89dff04c7267.json and https://artists.proofprofile.net/proofs/artist/f5ea3ad2-dad1-4ce8-9c3a-89dff04c7267.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 0xf3b330f34a0a6013bb903a0082baad60ccfffe093e6d9e5f25a446081b7f9831. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/QZZ7Q2427971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf9e0af715104f402396d1ba729572db1bbbd71f2387f4d29499e187750850b. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZZ7Q2479226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd597a04d27821808ffa28b1ce470afdb6504d5ee9abcc2b4f3c9e16d945d61f. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZZ7Q2481987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47feeff842d1195e4bc2b8d6e185def467b67be90cf9e748696c792e9e0bc5b2. 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/QZZ7Q2481993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a880774ee5cd932565709a78e03c751921c072ba6100969bce1fcd2fbe0a1c. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZZ7Q2481989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a74d4c93cc3b8b58f44048f45275fbd069984e1bf8d441ac6ec0f115dfc096. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZZ7Q2481985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa328ba3ef9e971dd871bd82e8c863fa014814e59201230dc88284659ef3789aa. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZZ7R2414158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0157d9a592bdd27b948710d5b5083842064167674ac50331366973ad1104a6e9. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZZ7R2414139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8610dfb42e3c91691c9fa80e6bbf75c54d29c81a57efa5191718ae15d4460a4. 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/QZZ7R2414159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4609b5f58f768f70bd51824729f943d9d2717119adc52704bfe32d17c93972. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZZ7R2412601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2719d5cba952824ce5cd7fdeaffc5ff0b3c16b24ac4f79472b5be4528abee9af. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZZ7R2481386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc4547499e8c4f6096edd47f53d78e2b873c66f949b1d26031ae8550ce21be1. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZZ7R2481503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeda290a7dead7a3c1e0c543b99da7fd6964ce51781c935f8b8a558296a61aa9. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZZ7R2481434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82333df90c5f95299860ca07a432c3975568ffc6399403d257fb630136443bd5. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZZ7R2481415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c212c61e3539d22442488e3f821131091a14628689f1674693fbe005761611d. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZZ7R2481388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ed3c030c546156f4c5c97b1fa11d310d32845244a8c09fbc3f3974c948475c. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZZ7T2489094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc16cc5e74c4be351670c40632e37b3fb0740402b1713999f230b34a2330647. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZZ7T2489090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d62946dd4076ba356e1f45e8f65d2590a1357c072bbac3642476ad60515d4a. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZZ7T2489092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca26ccbfba3811f4f2da93cda872a326c014f583f565b11d1bfa935832c3a856. 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/QZZ7T2489089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9456c4778df872f9bb857f10f49021da6dbfbd92ce53ab97c7806f49195cd86b. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZZ7T2487588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23971d84145bf95b168a15ec09ef929726904e9ecef8f8aa7a52cb70e1b4ca4b. 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/QZZ7U2484613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70d9ed5b35c8c2b8deda9a7beb952a631df5bebfb13bd9f4ba78dc63fb5efdb. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZZ7U2484616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3cbdc84a47a863e058e264a75d939f788b3538680d80dcde47f089468e920f. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZZ7U2484594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98fee1cecaf9e3dd265cf1871fb67f20b9dd88633222e80c842ed3595d49fac. 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/QZZ7U2484598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56f651cb19e895a5e46e8ffa46011c1d880e68cfc89f612e5309a3b1db39c01. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/QZZ7U2484615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27e47c4a498a4d7a4182a84b9274e4f8199f5e19cec2fe1b4cadd5e88cc970c. 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/QZZ7W2421318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7902deaa01d001628e7cd813fdfaff4ec4d848e6bc8d75dd5b635c76bb66c6. 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/QZZ7X2462049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2abbfb8d6e79767e1d2b96b28b0a97ee135763d4f2d01306759e56ebf65ffd7. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QZZ7X2460362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05e1bf464f4776aa6dbe66ccb94cc1aa6ee3d73f3c52c5ae269e48b993ea3f5. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/QZZ7X2462053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3e6f10170740cf48c6bd9c2f8a33a35d4ca3425ce88fe3b4a162379e06fb90. 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/QZZ7X2462056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d6deb20e9cc928d7aec6375292dc39865b04e8dfd7f88d47aa68221a8f3d33. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QZZ7X2462055.