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 0x866efa96307e5f527766341f99b2652a5be65d99c358c9eb02f86334ab1671e3. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa638822-56c1-4cca-a7ae-5dff4e4dfa93.json and https://artists.proofprofile.net/proofs/artist/fa638822-56c1-4cca-a7ae-5dff4e4dfa93.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 0x70eedb37bd145cdf84fd1276771f60c397e068131783f605a5471f0644f8e7c0. 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/CA5KR0021922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aceeda3a4bfdaa1e89268487b692f10dae5e291207fabd2c3c5e9c75504e428. 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/CA5KR0021923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9124ded8c3ae86ae8094c2ca746cf8e2b0b3e11813704dc566840ec365eb7ed. 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/CA5KR0021925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe263c978092a67a2953cc3f77c94a76f867b208cc566c0bd8bc901cb34f8fd39. 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/CA5KR0021931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49413bd08cdf65fbe93873411fe32a1df6c8e419a6b05eb10433c71aba8aa39. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CA5KR0021934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6afcdb86ae7805b5329f6313fa4b98f59e8000f6b903398680f48ce55f35f92. 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/CA5KR0025979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbaf3708bbaa77678e86fe0810f6f3c8ce41ebbc0e5d15f1efb25af2b4cf8a80. 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/CA5KR0025981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3bc04f24433916a66be12817afda8b167fd1d132673f46af3463fa2ec0dd1e. 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/CA5KR2038042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d64d33e2c5e7e7f96cdd71a6ed061f1f134a90d77b137c07e2d792dd25053ae. 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/US3DF2116524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e10bcadc4f65f8664fa76cc9d01e6d71e67b12384d42b918cd2553d12bcc0a2. 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/US3DF2116532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb185c0929813990e53b04c179cd1079ef3c27635fafed8f3a34d76eee14c5972. 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/US3DF2116543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71fd4123485c5aaa791496521d166547e97eed91b6395117b7e3879cba2412ad. 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/US3DF2116546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ad5dd7f0419f3e4410bfb4c04ef67013d52b18558a518b5fc5721c58af9fe6. 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/US3DF2116550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba2b75501f523068b13d223c9ce825deb1c44bd4f708a17b3406556ab0d057d. 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/US3DF2116562.
Homenaje a Chico Che y La Crisis , Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ba06e33745ca9ae37c54079a7a6374794926967601f86ecc82c3216da7653a. 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/US3DF2116504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a884757b3b6641323d8604f31e701ada470945c6f9dd8cffb7faf2b90b70cc8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US3DF2116511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94892e33ebd7212dc0008347b36bf525d7a0c67ad6442c43d0524c13c0a33e52. 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/US3DF2116513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe810460b1633cad057051597c49981bc09d4cce2ab6ad4244f9eb51d9a70d9ba. 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/USANG2180875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2dffdf008fe07d5048170769007bf9cf66950c0eab36428f3babe81a3bf713. 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/USANG2180834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef734dfa01a6ed816bab806fb5c1f12dee92122720977314c02b99c7ed681a0d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T13:49:49Z), 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/USANG2180837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcad45e4a06ec3c124cb42f5dddf62dd0685d0734d70e0f3944713e934ebe39b. 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/USANG2180840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176caa3b2a2e254c3de8fb4a5ad8a8453b9ee076e8c0f7a65b87e0069b27d57f. 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/USANG2180844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758bfc1f02b229166b71f17df4258b8e1a16f5944e736a938e87cd846d04fccc. 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/USANG2180845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6d2abc9ec69a28b3d7c5ffc14697f84ecd639dece3dd576ed3404e60d1543a. 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/USANG2180849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0993ea134e927c41cd47c5f79a982a61149e5375eaae7888ae90d36dd30d62e5. 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/USANG2180850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb577b323e57a3e460f00b94b36a6201a7792ef22f8d9922d70929a2ab04ce252. 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/USANG2180854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef6c3dd4dd1503de5ec38f5a13be974162472262e2565a92d48db7d53c37c26. 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/CA5KR2012358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047773b0e03ff4e4d952247b2bd929020eac4b4ddeaf1a4a98f186b58842b57e. 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/CA5KR2012356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe147d63cd06482ea67c8c25ae69b1127bf2af3abc0b6ca2262c56e99d27a2725. 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/CA5KR2012353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb49f73e1b0a0f092329f6cc8d379998c226e6992f0094216e92436407299c83. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/CA5KR2044106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118fbef07239b66b4378903c8838fbed845bc979baf6d5baa3876668900d52e0. 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/CA5KR2044109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9069ea4e8a2b7dca6bfa92734881b014821c1c20511c117fccebe939703c9938. 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/CA5KR2044111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa347ee9426bc611b707f01e414f40a3af8bdee2c031c6dcb5225ec600f49b6. 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/CA5KR2012350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe147d63cd06482ea67c8c25ae69b1127bf2af3abc0b6ca2262c56e99d27a2725. 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/CA5KR2012353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047773b0e03ff4e4d952247b2bd929020eac4b4ddeaf1a4a98f186b58842b57e. 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/CA5KR2012356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef6c3dd4dd1503de5ec38f5a13be974162472262e2565a92d48db7d53c37c26. 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/CA5KR2012358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a84379c11ebca34e473c842debf7c6c51170b58a159a46d7e20864c635c803. 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/CA5KR2091388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd73179b2d5f2514d7d24ea6a1d4359917eb770f830f6c32c58c1629b2b6ba01. 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/CA5KR2091389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5945766f0d9b5c5ea9a70cec08bf71683961550e88924aa3718d8093c443af. 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/CA5KR2091395.