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 0x21e24037a05cbbdd68b8347feda514de1af600c1d58750f9451d7e90e757ba5e. 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/c5ca9fba-0385-41ac-99f7-514c0a40c8e9.json and https://artists.proofprofile.net/proofs/artist/c5ca9fba-0385-41ac-99f7-514c0a40c8e9.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 0xba766aee0523476efd29abdb68894190c68db98ca8f379b3f0e471622c95d3f6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNJX2111996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56daddc5f5d52a5f86011fd61374ed7a476c517324fd63b8fb16564b08482a9a. 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/QZNJX2111999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144eb6a23dcca6e32b998c4b616e91ccbbc1cbbeb362cee6d17abfc07f698685. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNJX2112001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb72efef46d4aa6613845ba15297813aeb93a8424ca76e74c14111a8248228c. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZGLM2288378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19eceaf8b8c85f35eb9382a8aa0793205c3cb2f806c2ab7046dfde4041b9375. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T00:40:29Z), 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/QZHZ62282834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d09edf1540d295d375778ceb37b85861a32b841f7d1d730e3c3d08f3173d914. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZW9K2341206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe299c84dbb5510916470fc03a9192f238ce25f2564003d0f7bdc168e7a14aef. 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/QZW9K2341207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5497b679536e9f32b1ad4d97a524ff1c09b956ead07b5d2302dde7e186c5e1cb. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QZW9K2341208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dde50b7d6d4482526965e6b33f2bf49fda2b07ed490c55a1cf415bb36785768. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:46:20Z), 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/QZGLM2452004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd85e48f19c275ddded65a0c8236e584f0f4f549e1b5d1378d2ad6bec5e540b. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZGLM2452005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983129d23b3e5ab5c8b98110e57d82548f280f8e74e6998252e27a1f4ed2cb58. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZGLM2452006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36569347398d784fa031b62ec237cdbb7351e158b39db962ebce4cbbc34b96e4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZGLM2452007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3983ea4b95c8949cec80a867a5b09dd86c495ea968e9e90ec2be9085a92793. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNJX2477310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3149f0796c83c5449f9053a0d3f9621a8607b1d0b347f1906b00c05d2f66e937. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNJX2477311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66749f0eb1a3adde28be7b43f9fdda9936384c7d302cc4d463df69231923f2a3. 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/QZTPX2455270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc893e2a59ad897287ed65b2e1bab37e7407a531f58cb48ffd40044020908474f. 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/QZTPX2498616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ca1eb29000ebf80de01ff78565de1000f3eeb47e4654037b8949caf7dd085b. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:59:17Z), 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/QZW9L2446084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555b8b2a5d7ef52a6e73d3b0ff77dafbab9018a11375137114100a975685e154. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZW9M2473935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28320dec2c622e3b909df637907d0f38e3444e4de3f7be0555cbf9b40afef95f. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZW9M2473936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaea76429a1b84cb01e42490cce714bda5723d51a7c7b0525f99cef906c51599. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZW9M2473937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fba7a2b806f2f9255ec155a73a2c3ab7c4a18b9269c2fff80a62127611c0370. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZW9M2473940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e5e745888584780362591d29a9642707d13b3be86f9179301f111b67f58d20. 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/QZNJZ2241236.