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 0x6ee22aefee1d10e572bce23def4782770528270ff7685e56ae9f0d5e5a0b18c6. 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/01300529-ebbe-49bd-93b8-c67e9499e690.json and https://artists.proofprofile.net/proofs/artist/01300529-ebbe-49bd-93b8-c67e9499e690.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 0xb3ddf80c5d2c06a08b6860d5e99ff4800ad047c6438bd0a8e648d97df9f341dc. 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/BEK011800153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73191d16ce66ddea94d785d66de861d9aae080c32c14eb038db6ab4d314a2cd7. 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/BEK011900349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e62f27b871a41f3a317941664ee9c9b3dcaa686ef8b549e1641a92670c2ee5. 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/BE3JJ2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4eb77ffbd764c0b57f6565febf16de6fa5a8b0437804ad49e53f247ede531e7. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/BE2JX2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6e1b2a88033cd419ed26b78e9ce8703059a8dd05ac626759ffabfd002b9ee0. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/BEA032000320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6108a026381839b24f4b8c7ef681379c4769f21fa6ad29cb85ae45e995ded0. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/BEY792100022.
Bos Voor Iedereen (Campaign Song Natuurpunt)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf8d3fea2514cc0c148035de9c712a2390ac1825662c268fa22bf598449a69a. 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/BE3JJ2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10a06ad461ac817e4225e60bd9e9596f892655acfebe2d9ba006197413f0299. 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/BE3JJ2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2d37be2a6ff9c359d7e8eee11e14cdcba63f5ba43d37e1eb2605f2795863a9. 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/BE3JJ2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2d37be2a6ff9c359d7e8eee11e14cdcba63f5ba43d37e1eb2605f2795863a9. 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/BE3JJ2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4867edacc17a9fbe314a68a20d6845d26f778c1bd8e3ac53789ba7702c3ee9b. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/BE3JJ2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48eb7d2abe77e0fb260837e3295f0eb37e165360dfc02c47e796d2885dedfb28. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/BE3JJ2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf8d3fea2514cc0c148035de9c712a2390ac1825662c268fa22bf598449a69a. 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/BE3JJ2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd67027a1fb85f2322a3e082a6289b006ee1f2e7cd499857b27098431caee16. 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/BE3JJ2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ead34794247894b8e39b7c8953f198dbe9932b82b1581dd59cca5fe0e2bc9b. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/BE3JJ2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10a06ad461ac817e4225e60bd9e9596f892655acfebe2d9ba006197413f0299. 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/BE3JJ2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97113dd1cdc8b8117cd8ef455c5a22dad02777c8f78e156cbe482dd14670ebdf. 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/BE3JJ2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bbb700783dfc51101d61071f7c363bb60da0134d066d2198e137110fef3ad25. 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/BE3JJ2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8c07a9f7b93ac0742718405ad875695e9d30e7f3bc7222b8683dbc1c007a16. 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/BE3JJ2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845739ccf3373c0782114de65259ac79fca964a90fa7ab5cc120e2d1000550a0. 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/BEKZ42100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845739ccf3373c0782114de65259ac79fca964a90fa7ab5cc120e2d1000550a0. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/BEKZ42100003.