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 0xb78ccbe3608dcf30277cde987ca9af4afee35c25739b6cee2c952b14d2bd532c. 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/883c6a65-362c-4f33-84a5-c0e7ff2e6412.json and https://artists.proofprofile.net/proofs/artist/883c6a65-362c-4f33-84a5-c0e7ff2e6412.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 0xaceaec3d626dba4cf5ae01efec1f2cd241b0a5fb8d3a80cf3eacd5c60ffb0b07. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/ZADN42000090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1c619ddae8ad131e06644536270c6333696ec224a4424e78d68525ce7b8181. 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/ZACN42001412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f2e91c460c35a3ecf9153629e4a6e0ae7b2701466a0181ba8aedacb4dcd271. 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/ZACN42001501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfebccba50887513ba1dc30386772f99a0ae723d809f0ac0c9f7d17a0bbb12560. 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/ZACN42001512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c9c191987b368533d20ebd1b46108da0381913eef6c20a59f5a87f43519056. 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/ZACN42001513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089a6aa3e6b89e890b191ba0468c9e741db9a21b8bf3a287f89e39bbef1ea597. 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/ZACN42001514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66116dfd9aaee388e2e7e48c940a15e278a42d73d366b1a63befdb6b0555a1b. 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/ZACN42001515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab07378b317c8ef5b2dc4f43cd829053ccc6de915c4347042a04037ad47139c. 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/ZACN42001516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9a06c7512b43e4780904e283f1d556b98f9a85469ce9e3ed70fab6521a51f4. 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/ZACN42001517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaee34e028cd6fd1dfcfd0964cd7c13fc2c802025bca08aedd1eef811d859bbb. 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/ZACN42001518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa046f9b6719aed13aa7d8745c52ce1a03c64d68a211bb599092ab04bc411a362. 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/ZACN42001519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71f5e22e5494c3f16c73c52a28d5f4a1fa2efd98675fc3e30e620dd18ddb4c9. 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/ZACN42001520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92ea9565069a04fd35ab7ce86a4dc6fd92069281e63608771e6d2e8cba667c9. 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/ZACN42001521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb59bd4d34d695676da441c6ed3f721365345e2910f97c18103355df46500385. 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/ZACN41901402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce04b00fc7a1c9c9411cc2d7ef9a37a54885fabf5d11362faa4b17c6b736b5a2. 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/ZACN42001522.
Soen My Op My Mond (Uit Die Gelofte Musiekblyspel)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d0ed9082c6aec5e4768f49f57653af4e9af19d2f81e1e2fedb11326004b9a6. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/ZACN42101693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c950040863981898697b83b9c0793ed6721a00fa1d3e23e10586b2d94d9d51. 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/ZACN42101694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f49498c2b71e0c039c3feff00c7cb00a9b9a1f6968dd3c12827e1b63eff769. 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/ZACN42101695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe6a6c6a9d02e9cf8e7a4f557ae52d3c590a765551ac49090fcaabc3a9a2a86. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/ZACN42101696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98479ae0c6419cdce9502e73c1a415891489eb1d56a692f458a4fc6edcb6784. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/ZADN42100123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5415649c298b3632f7e28082818d5f8ba444a8b3a33e0eee2e3e4f69bde1e0ad. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/ZACN42401838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b24517c9bce8b9e5277bf1e574b48c91deeb1c9299a08e1edcdcab5344669a. 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/ZACN42401841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9651d89cad72a6e4baf2c5a9950c42b6340e5a78c1c2046bc9da00f329db926b. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/ZACN42401843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff223e2d7ee7cddde8030a942bdf5cc71fa5afa79f4a19e7c68e41ae6d49aaa. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/ZACN42501917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1c619ddae8ad131e06644536270c6333696ec224a4424e78d68525ce7b8181. 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/ZACN42001412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196e20063aec1bf169c9901a25c4588027e0f4b06c9c897f0d9866a2a3489459. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ZACN42101688.