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 0x1469c71f61d580aa1d23fde686f69530583145e432e5a64c7bd93922ddaa810d. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/60754dd7-44d9-437c-a6a2-f34bb2f49c29.json and https://artists.proofprofile.net/proofs/artist/60754dd7-44d9-437c-a6a2-f34bb2f49c29.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 0xa40e74d42937f835303020f3e40aa2461719ff8593498e996b9b4edcfb0d9e9b. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZP7F2554773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4732a4b199de0750b580ddf51650d03c8627f09ecb1a8ce9fde552bbed51acaf. 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/QZP7F2554774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2c23a72c110c6d13d5f4e73af80b5ac6c1ebaec1cdd5b926acdf27775bf6fb. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T08:00:33Z), 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/QZP7F2554775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e6c7789b889028c9b440120c903ae3cacbeca6b3591ef20a54a2fd7a09c21d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZP7F2554777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1fdfb92135167dd34a12506fd840987289005bdbad772464b25ab1d0afb471. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZP7F2554779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae83672357c25c0b24853f4acdc78ad6c57b3e0e508970d2f71405cb6b47bd6. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZP7F2554782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ef10bf727b3792289efc457d8d90fa9151268fb4d5dd570fdf99a516598329. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZP7F2568957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbce4b3c0bd9dd7a2b1c574814db93eef0c1df4535bb0f895c8e1536dee631a8. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZP7F2568958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0007a7b5cbe865f623c34908bf11f93bfffb4d8c2768388cc9e778f548d9a6. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZP7F2568959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c141250b456d4817f89fb3526ef261d2aca9d90e5c00b8febf08a18cdfbf66. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZP7F2568960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e890ec2e2d72ad319ab81c4976ab34f10ddd0a0d9a9b1c6c61fbb064abdc833. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZP7F2568961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb2e61e75f28dd0455146bbeee1c21d399570440786349991310088fa92879c. 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/QZP7F2568962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c5efd7f3061c1bfc446b7d5a068c6e95102a877c4021c4efe5c8102e4fbedb. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZP7F2568963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fba58326f71579a46a2463ae5a17083a65c49e428e663eb2a40468649b1cf00. 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/QZP7F2568964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf80c8dc573efc67093e34b162b14c90a2df143e35b62202747a6425d97b4e0. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:11:27Z), 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/QZP7F2568965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe42db1e913e0750d09d1ed1ff61ad0a9e162ae911f395fea8b000d8eb06857c. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZP7F2568966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c4a56bd24e2c13f033448c02ffd8f2d73517f8896513bc19ad54d4453d2214. 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/QZP7F2568967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5da0693749a81d3e6aa545d1d2ad96bdbb7f65d967d5942924e29e8193cb00. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:24:55Z), 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/QZP7F2568968.