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 0x43b1e8593242eb81faa3331790450ad97bd1a1a5d4159f87141c619d48621a4d. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0a90c020-dd6a-4556-b4e6-a606ee7dac14.json and https://artists.proofprofile.net/proofs/artist/0a90c020-dd6a-4556-b4e6-a606ee7dac14.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 0xe8bc853079d26a9bb918f47e267f4c8f7a1d6e658686e5e285d74ef117031c5f. 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/TWP012267201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e1ab5d3fcdf07e211daddf1ce7af5d3b296c62dee16271d214e134956112f0. 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/TWP012267204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01afe52f61ea2a9a5d05fe4e062f24d219b3d4e09dd937e6e4beb80156716b62. 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/TWP012267205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3be6641686bea1106ccd1b1ee0dbd31250bbd5983799384cec211fe63e787c. 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/TWP012267206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef20d1e53e65e29cff3b709d1a19537d48770ed4aa03c13a1935d66934df5ea5. 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/TWP012267207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa636606b800d38670aaae0031b3bb06b39ce2fa2f06a106d953822d22e98d868. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TWP012267208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeabc25773e57ad6b874c6886eaa23d880822cbd4163f8c44be3157bb0fb97eef. 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/TWP012267209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c58e66f8c3c77f2ba105f8a1cefad46efa6c6912337859b24bc369c45f7d5d. 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/TWP012267210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde97d3415d504417da74b9988cda98d3e41ca91c1c2c4ef09ae4665f8cd344bc. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:29:04Z), 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/TWP012267202.
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 0x998bf8eb9437442b21bf6200654d04a776a537ab208e93c581c8f517fe295f6b. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/TWP012267203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02cb09a98db2ba1f9bac12c81c63417ea16b6096aac3497a31199ee1997845f. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/FRX202072315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e353d0bab3e4dbc57ce5fd7a3846df37066646db09c450abd1b802b1ad9c148. 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/FRX202072316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7cf78d45ac1623d7e679ab13513bea7752cb94b4b3a9753503ca6073bc3f627. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRX202072320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40db435105e1471af03dae1b1af12163c9db4a09c8f98995ab0737cf75eeca12. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FRX202072321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13106b70a98014988aa6d567d9069c8364875f70e0f9acf9e2718e2226c8de0. 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/FRX202072322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608770f2bb4d81dd743640f6bbc48242df171d47ceb6444339160ff2f9086ebe. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRX202072323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0386ce9eedfba0906941dbad71b6843b50590a5c30792c6818b3bf0c46389e48. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRX202072324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1d9e6e6755c803c326709781ad2c6f2c99441557c20f5568b23a6710fae9b4. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:07:41Z), 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/FRX202072318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312848774919b43ce3507280ff629e7a19b54f7650d6916de612a51271047f51. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/FRX202072317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96048ddb6d9b1fd604a108bd934619275ef2f74dddec34a4542310e52a5bdbb. 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/FRX202072319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552c42ebed4c4e0a22c43b2abcf54aa9d3574248218a25bdef9300a565e4d1a4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWU712410292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656b70c0484c2d7d19a132bf2cdc6c7a5b00a841dd4362deb146e6bdd8c27b08. 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/TWP012367201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73cd37b0df5a7bb1e356087e06fad2ea72c5601656850e6a4cacd64951cc2e7f. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/TWP012367202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133a695abdba8f45ac29fafe2a5beb3d53967af86def87230ca62ba10676028a. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/TWP012367203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0667cbf86f9402697f2d453eecd469c1dae240223fb4c816049708e839a411. 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/FRX202047221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe83d57cf93cf0f8969a5319e66e1f2d4cb58d4989c1aec98199593e5aab9b5c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRX202047222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5492e4db7138cf1d407a062e14c266642d1778b41ee1d03d237cbf3e0c1d016d. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/FRX202047220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd480fbbc3cdbdb5a89c64338f8d2aadecfd24fff182be69f8e5d2a470799b606. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRX202047117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9044a4b865d59ac0b483c48c59173637fb0fad7e4a1b34d144bb1055e91650c4. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FRX202047119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05ad1bfb19c50d34c6fb9589255c9a42ac42b986d21dbf4f5dc5b3ec4a8b86c. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/FRX202047118.