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 0x0d5a432037e0a937057eefce4a49f95db07c104c01b0201493188549e6af3a00. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/49fbe13a-7bfd-42af-bb82-e23927ec5a53.json and https://artists.proofprofile.net/proofs/artist/49fbe13a-7bfd-42af-bb82-e23927ec5a53.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 0x430ca8b36b74f58fb1e4e7d69dd7cb2c9c6281f47fa1e5b493ab5c63953f9265. 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/QZDFP1864127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9983341f6aee692d614e8c7dcb3469fce9ab8c0160b154f5a0d1d846096d023d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZDFP1866676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad324edf4c409cfaeeba308ce20739a7503f08b1d8133abad5ceed8bb128179. 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/QZDFP1913855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90fe570f9329aca935e03974beb0623e8a684d751a2c3be95e68cc94cca9b486. 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/QZDFP1913856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4150a2c32c13195b9e2aa81e8c7df94dbfa8e3f6f111976b6ff4f1a3982964f6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDFP1937188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8d1be21c16aba9d69703f05e24357ec8024909f61e973d604122f86130e6e8. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZDFP1956264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7175b16f2e70591d37d953b298ee01e4405f5bfe8e92191601931c24961c3f84. 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/QZDFP1980627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040949b8ac46073b2bf0076e995290e74677d7ccdacc04003f904051f95f1e41. 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/QZW9L2245326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0360cd3d52008428e437cfc7acfeb1160a4e615ee0cbd6fc9ba751e77b9b879a. 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/QZW9M2289812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73be52aab047035c307e52afb810de6f81b411bd424a18d2ec3d1b47be6a5888. 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/QZGLM2342812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc904c69c8cc78b257f77c8a6e091c12c44478861e56a4d114d03b001b2cbd2e9. 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/QZGLM2331368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd608c885a0b0d5a77e72a54d5bdf38af868a5007bb4867db19a8bee7ade6796c. 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/QZNJW2320347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59b36bb7e4b11402c4f17cb7c9422e97b0f3f2c759f141a7e4c42edaa75ee4d. 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/QZNJX2363735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d7f80cb0b58f6e7b72b6bb1095b741a5c62a5d2a87eb4f553d451c118d66b7. 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/QZW9L2303904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9c921b033dbe055f4c545d24200c52ed7b277145d1d14bb9c97eba1215f761. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZGLM2445084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc1d9ee201840a2df0c11dc785e153c7c41929d5a7ccb77c66321f6b7763c01. 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/QZNJX2484864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efdb56afd76b3b4a2abda83ab32f8f47422fb0099a0db28847864b7347309da. 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/QZTPX2438029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0685c9b2eb782ecd5666e20205486314e97c34ab357277bc1b427a86195720b4. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:24:12Z), 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/QZW9K2466329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0472c857f2d72a41d966d8fe6a3a580841d8648afb01a0c5cbc92713f4d4a7ad. 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/QZW9K2488512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90cca04203597f3aa02db5e477638fca7df8bb2d44173c2e98f180444ce18d0b. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZW9M2449118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94af906ca6e1530a3badd3f484de1e6790ce1a6b9b52372dd212bda3728b450. 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/QZNJW2515306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e1488df9d72c35d370bcc40a3819d6750816af44decce2c6598b77d36d9b0d. 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/QZDFP1935071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650786cb7f67057a681edd1f5d767c8c8524942c11587e2fc0000207bd0e92e6. 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/QZDFP1923622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083eb516dd173682ebe7e8b7259e913248255cd7b936ed9e488133b1bb49885d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZW9K2374400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171fbec978497cfaf8fde5d400dd80fa8a571cfc609f9e84d1c82c3da397c815. 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/QZDFP1963107.