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 0x475fef13114f782cc964d8f6b76e9ff3b575072437619f5a006e7b0cb405d8c4. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/29336b1d-6bfe-4aea-80d4-e7aeb0a8f0a6.json and https://artists.proofprofile.net/proofs/artist/29336b1d-6bfe-4aea-80d4-e7aeb0a8f0a6.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 0x6632a5c87df9f4f4b55c396f64b0b2c4ece8466586be95bc4390361255e831fb. 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/FR9W12215766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc23d4a9bae660c991eaae4bc8a944484ef614d8accf21fa5f9fa3feb9637e2c. 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/FXR142400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f2ba7809a3809f49f8e48e6660faf108e9dce48e2deba2620d26a5229bffd0. 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/FXR142400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eab385994ba64bc6f2fac6c3cbd82f1f8d46e411f8aaad1b4a90e43f9a65a46. 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/FXR142400061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591b891264ebd7e9fd64e51652beebfaafc3d3eae0c98d4484f2430b5f08447c. 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/FXR142400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b55c77d21394a291581d62fb505a37c8c091614070d3bba2c77af206b4d480c. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/FXR142400063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e5d7b1e22d46c58a518a659932f05456ff57b658b86c80e69baf0a0183d0fa. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T15:35:41Z), 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/FXR142400056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0489a20ad8f55598aa857471a32f6263a69b3c873442998f27dd6afecf3010. 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/TCAHN2306404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff621744273c34eb382d32e43fdf9437ec5ad2bfabfa207c3e211651ad83885d. 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/TCAHN2306417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8beb88d2e32b69937cddaf0f3f48eb8a39f745b3dd62f36df4bf76a95cf5a7ab. 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/TCAHN2312643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f95a7c2eb755f4bbf46ee0c8071ed8f323983f8e9e96723b1fcef9930ed9afd. 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/TCAHN2312650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0535f3e756c0a41bedd8b5ba2c7e4c3727d292f08831c56cabaa75d84220501c. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:32:48Z), 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/TCAHN2306450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d2a1a63cfb845ee185d75e21da4f2b2e96ff9e6db6b0eda95b97fb1a7fdf33. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL4NL2161423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9446bc946cec6604a1f4f0c8abbd913ba2dfe34c410e45838a5cae170dac7c89. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL4NL2161424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba67a1b8e7c5d2abccebacd6aa67488353ed5072e956e288d57554fc5ca6f53a. 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/NL4NL2161425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd245d14b8ad20101a9d8c6af04006da19cb551525c5476ba9b9140e3a45569ee. 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/NL4NL2161426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ec3c118d97d15538e4f26d06539bf2e4bb85b446a2e4570d2a56aa39e1fa2a. 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/NL4NL2161427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f541bbb02e396db072b1b38bbb4ca5b8d65c8b9929d05a8c6050703d52f9f9c. 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/NL4NL2161428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a198c520ad96d23091499fbefc652b1364b12996c22ecf9a2dbf1c4f87cf34c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/NL4NL2161429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c6bb8293e2b22f512b19f36ded5bae1f26f0f09e46d21fd31947e2febc920e. 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/NL4NL2161430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07590bba1c4e659ef83c18deae03631a3bf19e40f2edd61d3fc5302c44854613. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NL4NL2161432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31999ee76d968416b4f74f2d05579e2b49dba62b7cf90ac9c810c71a3ecedefc. 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/FXR142300119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc74ae3f03c564fa24e202f2e17184664dc45b7bb37597d4d850d5a78854c72. 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/FXR142300124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31999ee76d968416b4f74f2d05579e2b49dba62b7cf90ac9c810c71a3ecedefc. 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/FXR142300119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6571579bde6ddaccdcb0abe4ea1910071666ab667d5d65e209088ef2c138c1e. 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/FXR142300120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60754851219d3273ab62e108cf321892f6adbc7c1d1da92abde0ab32a9e38b64. 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/FXR142300121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044a96d9317a9f5143b7306e77eb1fc325fab785f027f3ca7cc575f67a9e2e05. 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/FXR142300122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc74ae3f03c564fa24e202f2e17184664dc45b7bb37597d4d850d5a78854c72. 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/FXR142300124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6632a5c87df9f4f4b55c396f64b0b2c4ece8466586be95bc4390361255e831fb. 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/FR9W12215766.