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 0xc73c8f3fa3340a587a5a96dbc2e91bf357902610672fc5b4e85b62126d0e3379. 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/51fb6e8f-aca7-4b18-9d38-6c08ad5c5308.json and https://artists.proofprofile.net/proofs/artist/51fb6e8f-aca7-4b18-9d38-6c08ad5c5308.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 0x4a1d50e2602dbafa66b336f2a4ce37ca82e77743178219c07b0ddd4aa3875d4d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/AEA2M2238300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2c80e15c5880fde58e98a15aedefd0cf95914bda0ad702b07ae23de9570616. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:28:04Z), 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/AEA2M2238303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89ef335a9a02f74200b04a698a6b72206c29bbd07d2bd960adaa3b09c4855cb. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/AEA2W2231174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c7681ceb1c1e591bff4087150259471a052a944903fcc0f084e424d621f72c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/AEA2W2231179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ba7e3221e98aeaa2c1ba01890bec2652c310b17087b84e7d11f6860963380b. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:14:30Z), 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/AEA2M2383925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece7c04b82f48ce8d748f55f296faa595e4980347fc6601034715fef63c467d0. 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/AEA2M2383928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b27a1acb2582906850c37bd8cd4e32aaeb28d54665ab60dff705a95a0424f5. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/AEA2M2394467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba776fe37acc4ac41c8e9b23b2b4f06e75edc8b18a2e010c207b9c23d115e73. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/AEA2M2394469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0957b3868f00a1584ce1260bac12bb0eef08d5ee8218484a3cf44d5772303c8. 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/AEA2M2497265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a7618b91fc82367d45fd77bab1942aafe222d54b4755f8fa9186db45965fa4. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/AEA2L2433565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0d3e20ff3436afe22a16e89a22598bad4faee375defb8788f137b978f8a896. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/AEA2L2433567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3515cdc1e7f9cc600e25eab09654ebd0880fbde2e9c85afda4b12ab0e1e85cf5. 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/AEA0Q2462193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543ef2087cf70bf3baee883910385ebb06d94bf2b20f1cfbde6902a648d65012. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/AEA0Q2462194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e632f2c60b2595bfed147858868e040d3ff25a769a8a8560acceb74ab633ec. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/AEA0Q2462195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0891382344fd8dfe2c555e4b6a4fe27a8b80054821735fc2113fe9c3febd6f41. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/AEA0Q2462196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd4de960059c2aa3ac753c49f70c8869c734d43a62b7e8b1d42f63cbf70a5f9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/AEA0Q2462197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74104d8470f1efa2e1656c783fdc9017c599fb1bfef3824e9ca8f26e0f8ab085. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/AEA0Q2462199.