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 0xcb876216045a75dc9e72f2d9842f0488ce55d0fbeb119405fef112fa2abb619b. 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/f6fc921f-fa80-4eaa-97e9-90edcd06947c.json and https://artists.proofprofile.net/proofs/artist/f6fc921f-fa80-4eaa-97e9-90edcd06947c.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 0x81de5dba67a5be02e7436b1e09cb4291357eaec8c6c79ce687db6eaf548e16f7. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZFYY1984790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7782a4ce761c53ce9097905ee0f3353e969be3ecb3c6a25b7425569e2e2af531. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZNB82209849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb27c3623aea082c49385ed7f458f284563f9f976da337b28dba3cdc53a90288. 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/QZNMY2177276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96e7cf5c72d235603e3c84ef6cfb664118ac5d9fcd009646be302c568b804c8. 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/QZNB82209850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf38bda9692d8dc375d1fdcfc1ddc6925fdd0789779e9efa92c152f2b26b9eb9. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/QZNB82209851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2cb36cd1f6dbe9db1fc50afa49719b8a3f11a1e3f934f9983a635776215a98b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USLD91756235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb977057124f163e603ba1ca94bdeb2881c297e879e353f63885cfab48bb19071. 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/USLD91757642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9e7f40ca3f1f4597f23ab3b15623bfe91da3a891d4be6e63f14546566f43d5. 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/USLD91758690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9e7f40ca3f1f4597f23ab3b15623bfe91da3a891d4be6e63f14546566f43d5. 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/USLD91758690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2cb36cd1f6dbe9db1fc50afa49719b8a3f11a1e3f934f9983a635776215a98b. 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/USLD91756235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430f1e39273b47fe54384776977e8fe50b1b5b0c9216acf767bd0d3d3e4d08d2. 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/QZNMW2313895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29a93bf683b7fa9d4762afeeb3117c7e96a924d6b3ee391b5ed3df95e83f182. 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/QZMEV2395597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd1f95243283bafe119cdb738763eb3c4e2f0477a0e987d73dad09f6a3704de. 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/USLD91754525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce02802a8566df4f7bf980f51b0dfa0604314e558e473a3575ae6c435f72a4a4. 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/QZL382380725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57b4c3c1491b142f106a2d97e0b935f6c9e77a57ee037f2f5baa49aef438bb9. 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/USLD91752623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27251e5115153d931d83749a1d69ed5ccd61d721ec5f9074c8d076cc3541a78. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/USLD91759771.
I'll Say That I Love You If I Never Have to Again
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3410935c75eceab60ea436f61fbd939d5d3ee7b2639bd8dfa28eb247f0ffcf66. 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/USLD91759772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2c702eb3088e8b472bc060d8f11d487fb66409eee5f15ba13345633e02f46e. 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/USLD91759773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8060cc56f3666f4308c300baf34d9293a09ddc33edd710fcbe543b22b3dee71c. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/USLD91767468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d101c0454a971f02065f09c488f6ddd516ed05b910cd36d4d793793cad20fe. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USLD91775521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4edafbbb2e4b20ae8b250b7e4babd3f1df6ad6cc4154ed935346b87413e8c66. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USLD91773523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c8e142564bbbf9487fb5f6dce1fb4f050eef16d2d5ad3b567d40b05418a437. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/USLD91776895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fcb4af81f95c45b20a6a58a44f908f2fe3ef76e344d126e046ca079584cc27. 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/USLD91776900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d101c0454a971f02065f09c488f6ddd516ed05b910cd36d4d793793cad20fe. 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/USLD91775521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fcb4af81f95c45b20a6a58a44f908f2fe3ef76e344d126e046ca079584cc27. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USLD91776900.