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 0x33c5b44be8b671a59f012cba4b0db956fac16b7b130ca58e5a26ed9a5e8c8cdd. 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/6a5a3f1f-0a88-456e-bd00-07b9204a5e1c.json and https://artists.proofprofile.net/proofs/artist/6a5a3f1f-0a88-456e-bd00-07b9204a5e1c.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 0x5a8101c78f66ee9c5d65a4c7440c4087278ffbd364f9b818621cfbf0970141ab. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCJPO2197016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8101c78f66ee9c5d65a4c7440c4087278ffbd364f9b818621cfbf0970141ab. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TCJPO2197016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652b62e9847991f3ea18527e07bdc0352627170141b284fcde70de120d5ae2ef. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:51:28Z), 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/TCJPP2157616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652b62e9847991f3ea18527e07bdc0352627170141b284fcde70de120d5ae2ef. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/TCJPP2157616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda12f89417effa4625df6d197ca799994bd1c2306fe4a6919e0094f8250be1c. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/TCJPS2229880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48470a9631673452f5a9f08f96c5ca3f1c8f94322b75e161afb59baf69cbda3d. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TCJPU2384432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c61ebfb6342b1acbe5f1bc399222e286481d79dc89d7205ba89fa43cbf4270. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCJPU2384427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb059adfb96913480697393f635e001771bad093ef3aca5a92a6ce82310406cb. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCJPU2384429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48470a9631673452f5a9f08f96c5ca3f1c8f94322b75e161afb59baf69cbda3d. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCJPU2384432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4190c0ebf598d49d77a5b20fa49653064cef4dbbc500be3593821ad79ab8acc1. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCJPH2523760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad991111de52c3546d775a35d2cad9800aafd33a1701a3a7924ea02a82cc7da. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCJPB2415752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239790f03af8f405640b690c6e3e74493454619ab56a1c7858b524eb6e6c974d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCJPE2593763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cdf87c46b8bd4ae7cb4cb60a4ee3fab46616ea53bf0925e75db0dcfac1a1d62. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/TCJPH2523632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cdf87c46b8bd4ae7cb4cb60a4ee3fab46616ea53bf0925e75db0dcfac1a1d62. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TCJPH2523632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2518528a5b6a33c87f504db9a9bd5b4781801b5f86065986d99a99324601258. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCJPJ2559264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2518528a5b6a33c87f504db9a9bd5b4781801b5f86065986d99a99324601258. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TCJPJ2559264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45342e2f863349bc3b7f9802086fab4f5379f32224bde288781ffb3611d3956. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCJPJ2559256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca1ad5ee262498e8ea4929d9bdbdd16f9ed480a9a7c15623813a9c1e1d54c46. 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/TCJPJ2592315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0806b0f8ae774b7cb5de0a01d6be576f2ec6a9a842359c05dfe22c1f2c9567f3. 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/QT66J2584555.