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 0x4d743e1a4d1c62f07e5367f8b5768ac6e0590bc7618cc1276fd60971c4fa661a. 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/a26a67ff-8bd3-43fe-90c9-1ea5f51fecd0.json and https://artists.proofprofile.net/proofs/artist/a26a67ff-8bd3-43fe-90c9-1ea5f51fecd0.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 0x1b769f81812290d177e3f878b95aca718949d0c7319dd68b5e39c2532a68bcc6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHNB2063130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7936ec17b00ad42e2200a254f0ae2bfce9d1612fe33d60ae6330251586e007d6. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZK6G2044681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01860edde05099377107e0753b1c1be7c7f4edc73bc4d046017307280730469e. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T14:36:12Z), 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/QZDA42146862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c534f34197729ce0758b6840696454cb58df2563157bd7db378bdd16f5f747. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/QZES82136384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5024d041e9cd8579cbf50c2a2a4081c97502af9a73ab84ee92d9850ddf884ab. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/ESA011640897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7943f2692a195cfff986802f2ca920efc600f4e595f3a316c310619b98e348. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:41:17Z), 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/ESA011687350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918e6c669a65e34cc7d3c92994d66ae4a9b144c7dc5d1a913460328f1273db29. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/ESA012224679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269229c074d49b27efe6e123e099856efc1a5ae06d8b7d5a8d7baa113e9e9f59. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/BK4DA2301135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a7cb6458d5e5e83eed3e07bb6d01b3af1fd41a087975c5cce4ccf828ae2c72. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/BK4DA2307024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa432a7641d7ab8a77e99b0541367a5218c5a5706f8a966b1ad001587366a7350. 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/BK4DA2307972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819ce2ceaf38e6557d442e355e77ed4cbc4b85af1f84c64bae9744a612f043c5. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:24:55Z), 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/BK4DA2321008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1b62ccf3c000bb4384ce2d3e6ed7de4b5244dde747ad38d0e8cf9c2ea8a016. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BK4DA2321011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ca32e7d63bc0e049ad0b187570122b0c68dd7edb82b22e677a15744ee4c546. 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/BK4DA2321012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82893acdeda3ed647ec0a36ce3bf458a508543122fcfc97d30a9885d65ae1f53. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/BK4DA2321014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd687bac7728156a0c832fdc41e1df79c2a2e498e4bd5bda7fdfcb5c23a5dcf93. 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/BK4DA2437348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95542b9f96649c85ed3a370f8061928517ee2b75205954a1d50a0bfdebeda447. 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/BK4DA2523922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c380a513c729ed0597770b57ea2593c7eb4dd03c0ce115e51b94078b01061bb. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/BK4DA2531205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1fb8e98fbd84b244045eb00b0d0b616e87e6197224501896d742acc3f096ba. 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/PLB382400405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16630083325bfeabaffd3b49f8d29c5cbc08e1ff7cf3e20a28fc1fa3f7f5bc9. 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/BK4DA2510450.